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-rw-r--r--fs/hpfs/Kconfig15
-rw-r--r--fs/hpfs/Makefile9
-rw-r--r--fs/hpfs/alloc.c582
-rw-r--r--fs/hpfs/anode.c497
-rw-r--r--fs/hpfs/buffer.c232
-rw-r--r--fs/hpfs/dentry.c62
-rw-r--r--fs/hpfs/dir.c329
-rw-r--r--fs/hpfs/dnode.c1095
-rw-r--r--fs/hpfs/ea.c368
-rw-r--r--fs/hpfs/file.c225
-rw-r--r--fs/hpfs/hpfs.h560
-rw-r--r--fs/hpfs/hpfs_fn.h379
-rw-r--r--fs/hpfs/inode.c317
-rw-r--r--fs/hpfs/map.c335
-rw-r--r--fs/hpfs/name.c114
-rw-r--r--fs/hpfs/namei.c628
-rw-r--r--fs/hpfs/super.c793
17 files changed, 6540 insertions, 0 deletions
diff --git a/fs/hpfs/Kconfig b/fs/hpfs/Kconfig
new file mode 100644
index 000000000..2b36dc6f0
--- /dev/null
+++ b/fs/hpfs/Kconfig
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config HPFS_FS
+ tristate "OS/2 HPFS file system support"
+ depends on BLOCK
+ help
+ OS/2 is IBM's operating system for PC's, the same as Warp, and HPFS
+ is the file system used for organizing files on OS/2 hard disk
+ partitions. Say Y if you want to be able to read files from and
+ write files to an OS/2 HPFS partition on your hard drive. OS/2
+ floppies however are in regular MSDOS format, so you don't need this
+ option in order to be able to read them. Read
+ <file:Documentation/filesystems/hpfs.rst>.
+
+ To compile this file system support as a module, choose M here: the
+ module will be called hpfs. If unsure, say N.
diff --git a/fs/hpfs/Makefile b/fs/hpfs/Makefile
new file mode 100644
index 000000000..153c17382
--- /dev/null
+++ b/fs/hpfs/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Makefile for the Linux hpfs filesystem routines.
+#
+
+obj-$(CONFIG_HPFS_FS) += hpfs.o
+
+hpfs-objs := alloc.o anode.o buffer.o dentry.o dir.o dnode.o ea.o file.o \
+ inode.o map.o name.o namei.o super.o
diff --git a/fs/hpfs/alloc.c b/fs/hpfs/alloc.c
new file mode 100644
index 000000000..66617b155
--- /dev/null
+++ b/fs/hpfs/alloc.c
@@ -0,0 +1,582 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/alloc.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * HPFS bitmap operations
+ */
+
+#include "hpfs_fn.h"
+
+static void hpfs_claim_alloc(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free != (unsigned)-1) {
+ if (unlikely(!sbi->sb_n_free)) {
+ hpfs_error(s, "free count underflow, allocating sector %08x", sec);
+ sbi->sb_n_free = -1;
+ return;
+ }
+ sbi->sb_n_free--;
+ }
+}
+
+static void hpfs_claim_free(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free != (unsigned)-1) {
+ if (unlikely(sbi->sb_n_free >= sbi->sb_fs_size)) {
+ hpfs_error(s, "free count overflow, freeing sector %08x", sec);
+ sbi->sb_n_free = -1;
+ return;
+ }
+ sbi->sb_n_free++;
+ }
+}
+
+static void hpfs_claim_dirband_alloc(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free_dnodes != (unsigned)-1) {
+ if (unlikely(!sbi->sb_n_free_dnodes)) {
+ hpfs_error(s, "dirband free count underflow, allocating sector %08x", sec);
+ sbi->sb_n_free_dnodes = -1;
+ return;
+ }
+ sbi->sb_n_free_dnodes--;
+ }
+}
+
+static void hpfs_claim_dirband_free(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free_dnodes != (unsigned)-1) {
+ if (unlikely(sbi->sb_n_free_dnodes >= sbi->sb_dirband_size / 4)) {
+ hpfs_error(s, "dirband free count overflow, freeing sector %08x", sec);
+ sbi->sb_n_free_dnodes = -1;
+ return;
+ }
+ sbi->sb_n_free_dnodes++;
+ }
+}
+
+/*
+ * Check if a sector is allocated in bitmap
+ * This is really slow. Turned on only if chk==2
+ */
+
+static int chk_if_allocated(struct super_block *s, secno sec, char *msg)
+{
+ struct quad_buffer_head qbh;
+ __le32 *bmp;
+ if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "chk"))) goto fail;
+ if ((le32_to_cpu(bmp[(sec & 0x3fff) >> 5]) >> (sec & 0x1f)) & 1) {
+ hpfs_error(s, "sector '%s' - %08x not allocated in bitmap", msg, sec);
+ goto fail1;
+ }
+ hpfs_brelse4(&qbh);
+ if (sec >= hpfs_sb(s)->sb_dirband_start && sec < hpfs_sb(s)->sb_dirband_start + hpfs_sb(s)->sb_dirband_size) {
+ unsigned ssec = (sec - hpfs_sb(s)->sb_dirband_start) / 4;
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) goto fail;
+ if ((le32_to_cpu(bmp[ssec >> 5]) >> (ssec & 0x1f)) & 1) {
+ hpfs_error(s, "sector '%s' - %08x not allocated in directory bitmap", msg, sec);
+ goto fail1;
+ }
+ hpfs_brelse4(&qbh);
+ }
+ return 0;
+ fail1:
+ hpfs_brelse4(&qbh);
+ fail:
+ return 1;
+}
+
+/*
+ * Check if sector(s) have proper number and additionally check if they're
+ * allocated in bitmap.
+ */
+
+int hpfs_chk_sectors(struct super_block *s, secno start, int len, char *msg)
+{
+ if (start + len < start || start < 0x12 ||
+ start + len > hpfs_sb(s)->sb_fs_size) {
+ hpfs_error(s, "sector(s) '%s' badly placed at %08x", msg, start);
+ return 1;
+ }
+ if (hpfs_sb(s)->sb_chk>=2) {
+ int i;
+ for (i = 0; i < len; i++)
+ if (chk_if_allocated(s, start + i, msg)) return 1;
+ }
+ return 0;
+}
+
+static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigned forward)
+{
+ struct quad_buffer_head qbh;
+ __le32 *bmp;
+ unsigned bs = near & ~0x3fff;
+ unsigned nr = (near & 0x3fff) & ~(n - 1);
+ /*unsigned mnr;*/
+ unsigned i, q;
+ int a, b;
+ secno ret = 0;
+ if (n != 1 && n != 4) {
+ hpfs_error(s, "Bad allocation size: %d", n);
+ return 0;
+ }
+ if (bs != ~0x3fff) {
+ if (!(bmp = hpfs_map_bitmap(s, near >> 14, &qbh, "aib"))) goto uls;
+ } else {
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) goto uls;
+ }
+ if (!tstbits(bmp, nr, n + forward)) {
+ ret = bs + nr;
+ goto rt;
+ }
+ q = nr + n; b = 0;
+ while ((a = tstbits(bmp, q, n + forward)) != 0) {
+ q += a;
+ if (n != 1) q = ((q-1)&~(n-1))+n;
+ if (!b) {
+ if (q>>5 != nr>>5) {
+ b = 1;
+ q = nr & 0x1f;
+ }
+ } else if (q > nr) break;
+ }
+ if (!a) {
+ ret = bs + q;
+ goto rt;
+ }
+ nr >>= 5;
+ /*for (i = nr + 1; i != nr; i++, i &= 0x1ff) */
+ i = nr;
+ do {
+ if (!le32_to_cpu(bmp[i])) goto cont;
+ if (n + forward >= 0x3f && le32_to_cpu(bmp[i]) != 0xffffffff) goto cont;
+ q = i<<5;
+ if (i > 0) {
+ unsigned k = le32_to_cpu(bmp[i-1]);
+ while (k & 0x80000000) {
+ q--; k <<= 1;
+ }
+ }
+ if (n != 1) q = ((q-1)&~(n-1))+n;
+ while ((a = tstbits(bmp, q, n + forward)) != 0) {
+ q += a;
+ if (n != 1) q = ((q-1)&~(n-1))+n;
+ if (q>>5 > i) break;
+ }
+ if (!a) {
+ ret = bs + q;
+ goto rt;
+ }
+ cont:
+ i++, i &= 0x1ff;
+ } while (i != nr);
+ rt:
+ if (ret) {
+ if (hpfs_sb(s)->sb_chk && ((ret >> 14) != (bs >> 14) || (le32_to_cpu(bmp[(ret & 0x3fff) >> 5]) | ~(((1 << n) - 1) << (ret & 0x1f))) != 0xffffffff)) {
+ hpfs_error(s, "Allocation doesn't work! Wanted %d, allocated at %08x", n, ret);
+ ret = 0;
+ goto b;
+ }
+ bmp[(ret & 0x3fff) >> 5] &= cpu_to_le32(~(((1 << n) - 1) << (ret & 0x1f)));
+ hpfs_mark_4buffers_dirty(&qbh);
+ }
+ b:
+ hpfs_brelse4(&qbh);
+ uls:
+ return ret;
+}
+
+/*
+ * Allocation strategy: 1) search place near the sector specified
+ * 2) search bitmap where free sectors last found
+ * 3) search all bitmaps
+ * 4) search all bitmaps ignoring number of pre-allocated
+ * sectors
+ */
+
+secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forward)
+{
+ secno sec;
+ int i;
+ unsigned n_bmps;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ int f_p = 0;
+ int near_bmp;
+ if (forward < 0) {
+ forward = -forward;
+ f_p = 1;
+ }
+ n_bmps = (sbi->sb_fs_size + 0x4000 - 1) >> 14;
+ if (near && near < sbi->sb_fs_size) {
+ if ((sec = alloc_in_bmp(s, near, n, f_p ? forward : forward/4))) goto ret;
+ near_bmp = near >> 14;
+ } else near_bmp = n_bmps / 2;
+ /*
+ if (b != -1) {
+ if ((sec = alloc_in_bmp(s, b<<14, n, f_p ? forward : forward/2))) {
+ b &= 0x0fffffff;
+ goto ret;
+ }
+ if (b > 0x10000000) if ((sec = alloc_in_bmp(s, (b&0xfffffff)<<14, n, f_p ? forward : 0))) goto ret;
+ */
+ if (!f_p) if (forward > sbi->sb_max_fwd_alloc) forward = sbi->sb_max_fwd_alloc;
+ less_fwd:
+ for (i = 0; i < n_bmps; i++) {
+ if (near_bmp+i < n_bmps && ((sec = alloc_in_bmp(s, (near_bmp+i) << 14, n, forward)))) {
+ sbi->sb_c_bitmap = near_bmp+i;
+ goto ret;
+ }
+ if (!forward) {
+ if (near_bmp-i-1 >= 0 && ((sec = alloc_in_bmp(s, (near_bmp-i-1) << 14, n, forward)))) {
+ sbi->sb_c_bitmap = near_bmp-i-1;
+ goto ret;
+ }
+ } else {
+ if (near_bmp+i >= n_bmps && ((sec = alloc_in_bmp(s, (near_bmp+i-n_bmps) << 14, n, forward)))) {
+ sbi->sb_c_bitmap = near_bmp+i-n_bmps;
+ goto ret;
+ }
+ }
+ if (i == 1 && sbi->sb_c_bitmap != -1 && ((sec = alloc_in_bmp(s, (sbi->sb_c_bitmap) << 14, n, forward)))) {
+ goto ret;
+ }
+ }
+ if (!f_p) {
+ if (forward) {
+ sbi->sb_max_fwd_alloc = forward * 3 / 4;
+ forward /= 2;
+ goto less_fwd;
+ }
+ }
+ sec = 0;
+ ret:
+ if (sec) {
+ i = 0;
+ do
+ hpfs_claim_alloc(s, sec + i);
+ while (unlikely(++i < n));
+ }
+ if (sec && f_p) {
+ for (i = 0; i < forward; i++) {
+ if (!hpfs_alloc_if_possible(s, sec + n + i)) {
+ hpfs_error(s, "Prealloc doesn't work! Wanted %d, allocated at %08x, can't allocate %d", forward, sec, i);
+ sec = 0;
+ break;
+ }
+ }
+ }
+ return sec;
+}
+
+static secno alloc_in_dirband(struct super_block *s, secno near)
+{
+ unsigned nr = near;
+ secno sec;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (nr < sbi->sb_dirband_start)
+ nr = sbi->sb_dirband_start;
+ if (nr >= sbi->sb_dirband_start + sbi->sb_dirband_size)
+ nr = sbi->sb_dirband_start + sbi->sb_dirband_size - 4;
+ nr -= sbi->sb_dirband_start;
+ nr >>= 2;
+ sec = alloc_in_bmp(s, (~0x3fff) | nr, 1, 0);
+ if (!sec) return 0;
+ hpfs_claim_dirband_alloc(s, sec);
+ return ((sec & 0x3fff) << 2) + sbi->sb_dirband_start;
+}
+
+/* Alloc sector if it's free */
+
+int hpfs_alloc_if_possible(struct super_block *s, secno sec)
+{
+ struct quad_buffer_head qbh;
+ __le32 *bmp;
+ if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "aip"))) goto end;
+ if (le32_to_cpu(bmp[(sec & 0x3fff) >> 5]) & (1 << (sec & 0x1f))) {
+ bmp[(sec & 0x3fff) >> 5] &= cpu_to_le32(~(1 << (sec & 0x1f)));
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ hpfs_claim_alloc(s, sec);
+ return 1;
+ }
+ hpfs_brelse4(&qbh);
+ end:
+ return 0;
+}
+
+/* Free sectors in bitmaps */
+
+void hpfs_free_sectors(struct super_block *s, secno sec, unsigned n)
+{
+ struct quad_buffer_head qbh;
+ __le32 *bmp;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ /*pr_info("2 - ");*/
+ if (!n) return;
+ if (sec < 0x12) {
+ hpfs_error(s, "Trying to free reserved sector %08x", sec);
+ return;
+ }
+ sbi->sb_max_fwd_alloc += n > 0xffff ? 0xffff : n;
+ if (sbi->sb_max_fwd_alloc > 0xffffff) sbi->sb_max_fwd_alloc = 0xffffff;
+ new_map:
+ if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "free"))) {
+ return;
+ }
+ new_tst:
+ if ((le32_to_cpu(bmp[(sec & 0x3fff) >> 5]) >> (sec & 0x1f) & 1)) {
+ hpfs_error(s, "sector %08x not allocated", sec);
+ hpfs_brelse4(&qbh);
+ return;
+ }
+ bmp[(sec & 0x3fff) >> 5] |= cpu_to_le32(1 << (sec & 0x1f));
+ hpfs_claim_free(s, sec);
+ if (!--n) {
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ return;
+ }
+ if (!(++sec & 0x3fff)) {
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ goto new_map;
+ }
+ goto new_tst;
+}
+
+/*
+ * Check if there are at least n free dnodes on the filesystem.
+ * Called before adding to dnode. If we run out of space while
+ * splitting dnodes, it would corrupt dnode tree.
+ */
+
+int hpfs_check_free_dnodes(struct super_block *s, int n)
+{
+ int n_bmps = (hpfs_sb(s)->sb_fs_size + 0x4000 - 1) >> 14;
+ int b = hpfs_sb(s)->sb_c_bitmap & 0x0fffffff;
+ int i, j;
+ __le32 *bmp;
+ struct quad_buffer_head qbh;
+ if ((bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
+ for (j = 0; j < 512; j++) {
+ unsigned k;
+ if (!le32_to_cpu(bmp[j])) continue;
+ for (k = le32_to_cpu(bmp[j]); k; k >>= 1) if (k & 1) if (!--n) {
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ }
+ }
+ hpfs_brelse4(&qbh);
+ i = 0;
+ if (hpfs_sb(s)->sb_c_bitmap != -1) {
+ bmp = hpfs_map_bitmap(s, b, &qbh, "chkdn1");
+ goto chk_bmp;
+ }
+ chk_next:
+ if (i == b) i++;
+ if (i >= n_bmps) return 1;
+ bmp = hpfs_map_bitmap(s, i, &qbh, "chkdn2");
+ chk_bmp:
+ if (bmp) {
+ for (j = 0; j < 512; j++) {
+ u32 k;
+ if (!le32_to_cpu(bmp[j])) continue;
+ for (k = 0xf; k; k <<= 4)
+ if ((le32_to_cpu(bmp[j]) & k) == k) {
+ if (!--n) {
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ }
+ }
+ hpfs_brelse4(&qbh);
+ }
+ i++;
+ goto chk_next;
+}
+
+void hpfs_free_dnode(struct super_block *s, dnode_secno dno)
+{
+ if (hpfs_sb(s)->sb_chk) if (dno & 3) {
+ hpfs_error(s, "hpfs_free_dnode: dnode %08x not aligned", dno);
+ return;
+ }
+ if (dno < hpfs_sb(s)->sb_dirband_start ||
+ dno >= hpfs_sb(s)->sb_dirband_start + hpfs_sb(s)->sb_dirband_size) {
+ hpfs_free_sectors(s, dno, 4);
+ } else {
+ struct quad_buffer_head qbh;
+ __le32 *bmp;
+ unsigned ssec = (dno - hpfs_sb(s)->sb_dirband_start) / 4;
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
+ return;
+ }
+ bmp[ssec >> 5] |= cpu_to_le32(1 << (ssec & 0x1f));
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ hpfs_claim_dirband_free(s, dno);
+ }
+}
+
+struct dnode *hpfs_alloc_dnode(struct super_block *s, secno near,
+ dnode_secno *dno, struct quad_buffer_head *qbh)
+{
+ struct dnode *d;
+ if (hpfs_get_free_dnodes(s) > FREE_DNODES_ADD) {
+ if (!(*dno = alloc_in_dirband(s, near)))
+ if (!(*dno = hpfs_alloc_sector(s, near, 4, 0))) return NULL;
+ } else {
+ if (!(*dno = hpfs_alloc_sector(s, near, 4, 0)))
+ if (!(*dno = alloc_in_dirband(s, near))) return NULL;
+ }
+ if (!(d = hpfs_get_4sectors(s, *dno, qbh))) {
+ hpfs_free_dnode(s, *dno);
+ return NULL;
+ }
+ memset(d, 0, 2048);
+ d->magic = cpu_to_le32(DNODE_MAGIC);
+ d->first_free = cpu_to_le32(52);
+ d->dirent[0] = 32;
+ d->dirent[2] = 8;
+ d->dirent[30] = 1;
+ d->dirent[31] = 255;
+ d->self = cpu_to_le32(*dno);
+ return d;
+}
+
+struct fnode *hpfs_alloc_fnode(struct super_block *s, secno near, fnode_secno *fno,
+ struct buffer_head **bh)
+{
+ struct fnode *f;
+ if (!(*fno = hpfs_alloc_sector(s, near, 1, FNODE_ALLOC_FWD))) return NULL;
+ if (!(f = hpfs_get_sector(s, *fno, bh))) {
+ hpfs_free_sectors(s, *fno, 1);
+ return NULL;
+ }
+ memset(f, 0, 512);
+ f->magic = cpu_to_le32(FNODE_MAGIC);
+ f->ea_offs = cpu_to_le16(0xc4);
+ f->btree.n_free_nodes = 8;
+ f->btree.first_free = cpu_to_le16(8);
+ return f;
+}
+
+struct anode *hpfs_alloc_anode(struct super_block *s, secno near, anode_secno *ano,
+ struct buffer_head **bh)
+{
+ struct anode *a;
+ if (!(*ano = hpfs_alloc_sector(s, near, 1, ANODE_ALLOC_FWD))) return NULL;
+ if (!(a = hpfs_get_sector(s, *ano, bh))) {
+ hpfs_free_sectors(s, *ano, 1);
+ return NULL;
+ }
+ memset(a, 0, 512);
+ a->magic = cpu_to_le32(ANODE_MAGIC);
+ a->self = cpu_to_le32(*ano);
+ a->btree.n_free_nodes = 40;
+ a->btree.n_used_nodes = 0;
+ a->btree.first_free = cpu_to_le16(8);
+ return a;
+}
+
+static unsigned find_run(__le32 *bmp, unsigned *idx)
+{
+ unsigned len;
+ while (tstbits(bmp, *idx, 1)) {
+ (*idx)++;
+ if (unlikely(*idx >= 0x4000))
+ return 0;
+ }
+ len = 1;
+ while (!tstbits(bmp, *idx + len, 1))
+ len++;
+ return len;
+}
+
+static int do_trim(struct super_block *s, secno start, unsigned len, secno limit_start, secno limit_end, unsigned minlen, unsigned *result)
+{
+ int err;
+ secno end;
+ if (fatal_signal_pending(current))
+ return -EINTR;
+ end = start + len;
+ if (start < limit_start)
+ start = limit_start;
+ if (end > limit_end)
+ end = limit_end;
+ if (start >= end)
+ return 0;
+ if (end - start < minlen)
+ return 0;
+ err = sb_issue_discard(s, start, end - start, GFP_NOFS, 0);
+ if (err)
+ return err;
+ *result += end - start;
+ return 0;
+}
+
+int hpfs_trim_fs(struct super_block *s, u64 start, u64 end, u64 minlen, unsigned *result)
+{
+ int err = 0;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ unsigned idx, len, start_bmp, end_bmp;
+ __le32 *bmp;
+ struct quad_buffer_head qbh;
+
+ *result = 0;
+ if (!end || end > sbi->sb_fs_size)
+ end = sbi->sb_fs_size;
+ if (start >= sbi->sb_fs_size)
+ return 0;
+ if (minlen > 0x4000)
+ return 0;
+ if (start < sbi->sb_dirband_start + sbi->sb_dirband_size && end > sbi->sb_dirband_start) {
+ hpfs_lock(s);
+ if (sb_rdonly(s)) {
+ err = -EROFS;
+ goto unlock_1;
+ }
+ if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
+ err = -EIO;
+ goto unlock_1;
+ }
+ idx = 0;
+ while ((len = find_run(bmp, &idx)) && !err) {
+ err = do_trim(s, sbi->sb_dirband_start + idx * 4, len * 4, start, end, minlen, result);
+ idx += len;
+ }
+ hpfs_brelse4(&qbh);
+unlock_1:
+ hpfs_unlock(s);
+ }
+ start_bmp = start >> 14;
+ end_bmp = (end + 0x3fff) >> 14;
+ while (start_bmp < end_bmp && !err) {
+ hpfs_lock(s);
+ if (sb_rdonly(s)) {
+ err = -EROFS;
+ goto unlock_2;
+ }
+ if (!(bmp = hpfs_map_bitmap(s, start_bmp, &qbh, "trim"))) {
+ err = -EIO;
+ goto unlock_2;
+ }
+ idx = 0;
+ while ((len = find_run(bmp, &idx)) && !err) {
+ err = do_trim(s, (start_bmp << 14) + idx, len, start, end, minlen, result);
+ idx += len;
+ }
+ hpfs_brelse4(&qbh);
+unlock_2:
+ hpfs_unlock(s);
+ start_bmp++;
+ }
+ return err;
+}
diff --git a/fs/hpfs/anode.c b/fs/hpfs/anode.c
new file mode 100644
index 000000000..c14c9a035
--- /dev/null
+++ b/fs/hpfs/anode.c
@@ -0,0 +1,497 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/anode.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * handling HPFS anode tree that contains file allocation info
+ */
+
+#include "hpfs_fn.h"
+
+/* Find a sector in allocation tree */
+
+secno hpfs_bplus_lookup(struct super_block *s, struct inode *inode,
+ struct bplus_header *btree, unsigned sec,
+ struct buffer_head *bh)
+{
+ anode_secno a = -1;
+ struct anode *anode;
+ int i;
+ int c1, c2 = 0;
+ go_down:
+ if (hpfs_sb(s)->sb_chk) if (hpfs_stop_cycles(s, a, &c1, &c2, "hpfs_bplus_lookup")) return -1;
+ if (bp_internal(btree)) {
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (le32_to_cpu(btree->u.internal[i].file_secno) > sec) {
+ a = le32_to_cpu(btree->u.internal[i].down);
+ brelse(bh);
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return -1;
+ btree = &anode->btree;
+ goto go_down;
+ }
+ hpfs_error(s, "sector %08x not found in internal anode %08x", sec, a);
+ brelse(bh);
+ return -1;
+ }
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (le32_to_cpu(btree->u.external[i].file_secno) <= sec &&
+ le32_to_cpu(btree->u.external[i].file_secno) + le32_to_cpu(btree->u.external[i].length) > sec) {
+ a = le32_to_cpu(btree->u.external[i].disk_secno) + sec - le32_to_cpu(btree->u.external[i].file_secno);
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, a, 1, "data")) {
+ brelse(bh);
+ return -1;
+ }
+ if (inode) {
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ hpfs_inode->i_file_sec = le32_to_cpu(btree->u.external[i].file_secno);
+ hpfs_inode->i_disk_sec = le32_to_cpu(btree->u.external[i].disk_secno);
+ hpfs_inode->i_n_secs = le32_to_cpu(btree->u.external[i].length);
+ }
+ brelse(bh);
+ return a;
+ }
+ hpfs_error(s, "sector %08x not found in external anode %08x", sec, a);
+ brelse(bh);
+ return -1;
+}
+
+/* Add a sector to tree */
+
+secno hpfs_add_sector_to_btree(struct super_block *s, secno node, int fnod, unsigned fsecno)
+{
+ struct bplus_header *btree;
+ struct anode *anode = NULL, *ranode = NULL;
+ struct fnode *fnode;
+ anode_secno a, na = -1, ra, up = -1;
+ secno se;
+ struct buffer_head *bh, *bh1, *bh2;
+ int n;
+ unsigned fs;
+ int c1, c2 = 0;
+ if (fnod) {
+ if (!(fnode = hpfs_map_fnode(s, node, &bh))) return -1;
+ btree = &fnode->btree;
+ } else {
+ if (!(anode = hpfs_map_anode(s, node, &bh))) return -1;
+ btree = &anode->btree;
+ }
+ a = node;
+ go_down:
+ if ((n = btree->n_used_nodes - 1) < -!!fnod) {
+ hpfs_error(s, "anode %08x has no entries", a);
+ brelse(bh);
+ return -1;
+ }
+ if (bp_internal(btree)) {
+ a = le32_to_cpu(btree->u.internal[n].down);
+ btree->u.internal[n].file_secno = cpu_to_le32(-1);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, a, &c1, &c2, "hpfs_add_sector_to_btree #1")) return -1;
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return -1;
+ btree = &anode->btree;
+ goto go_down;
+ }
+ if (n >= 0) {
+ if (le32_to_cpu(btree->u.external[n].file_secno) + le32_to_cpu(btree->u.external[n].length) != fsecno) {
+ hpfs_error(s, "allocated size %08x, trying to add sector %08x, %cnode %08x",
+ le32_to_cpu(btree->u.external[n].file_secno) + le32_to_cpu(btree->u.external[n].length), fsecno,
+ fnod?'f':'a', node);
+ brelse(bh);
+ return -1;
+ }
+ if (hpfs_alloc_if_possible(s, se = le32_to_cpu(btree->u.external[n].disk_secno) + le32_to_cpu(btree->u.external[n].length))) {
+ le32_add_cpu(&btree->u.external[n].length, 1);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ return se;
+ }
+ } else {
+ if (fsecno) {
+ hpfs_error(s, "empty file %08x, trying to add sector %08x", node, fsecno);
+ brelse(bh);
+ return -1;
+ }
+ se = !fnod ? node : (node + 16384) & ~16383;
+ }
+ if (!(se = hpfs_alloc_sector(s, se, 1, fsecno*ALLOC_M>ALLOC_FWD_MAX ? ALLOC_FWD_MAX : fsecno*ALLOC_M<ALLOC_FWD_MIN ? ALLOC_FWD_MIN : fsecno*ALLOC_M))) {
+ brelse(bh);
+ return -1;
+ }
+ fs = n < 0 ? 0 : le32_to_cpu(btree->u.external[n].file_secno) + le32_to_cpu(btree->u.external[n].length);
+ if (!btree->n_free_nodes) {
+ up = a != node ? le32_to_cpu(anode->up) : -1;
+ if (!(anode = hpfs_alloc_anode(s, a, &na, &bh1))) {
+ brelse(bh);
+ hpfs_free_sectors(s, se, 1);
+ return -1;
+ }
+ if (a == node && fnod) {
+ anode->up = cpu_to_le32(node);
+ anode->btree.flags |= BP_fnode_parent;
+ anode->btree.n_used_nodes = btree->n_used_nodes;
+ anode->btree.first_free = btree->first_free;
+ anode->btree.n_free_nodes = 40 - anode->btree.n_used_nodes;
+ memcpy(&anode->u, &btree->u, btree->n_used_nodes * 12);
+ btree->flags |= BP_internal;
+ btree->n_free_nodes = 11;
+ btree->n_used_nodes = 1;
+ btree->first_free = cpu_to_le16((char *)&(btree->u.internal[1]) - (char *)btree);
+ btree->u.internal[0].file_secno = cpu_to_le32(-1);
+ btree->u.internal[0].down = cpu_to_le32(na);
+ mark_buffer_dirty(bh);
+ } else if (!(ranode = hpfs_alloc_anode(s, /*a*/0, &ra, &bh2))) {
+ brelse(bh);
+ brelse(bh1);
+ hpfs_free_sectors(s, se, 1);
+ hpfs_free_sectors(s, na, 1);
+ return -1;
+ }
+ brelse(bh);
+ bh = bh1;
+ btree = &anode->btree;
+ }
+ btree->n_free_nodes--; n = btree->n_used_nodes++;
+ le16_add_cpu(&btree->first_free, 12);
+ btree->u.external[n].disk_secno = cpu_to_le32(se);
+ btree->u.external[n].file_secno = cpu_to_le32(fs);
+ btree->u.external[n].length = cpu_to_le32(1);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ if ((a == node && fnod) || na == -1) return se;
+ c2 = 0;
+ while (up != (anode_secno)-1) {
+ struct anode *new_anode;
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, up, &c1, &c2, "hpfs_add_sector_to_btree #2")) return -1;
+ if (up != node || !fnod) {
+ if (!(anode = hpfs_map_anode(s, up, &bh))) return -1;
+ btree = &anode->btree;
+ } else {
+ if (!(fnode = hpfs_map_fnode(s, up, &bh))) return -1;
+ btree = &fnode->btree;
+ }
+ if (btree->n_free_nodes) {
+ btree->n_free_nodes--; n = btree->n_used_nodes++;
+ le16_add_cpu(&btree->first_free, 8);
+ btree->u.internal[n].file_secno = cpu_to_le32(-1);
+ btree->u.internal[n].down = cpu_to_le32(na);
+ btree->u.internal[n-1].file_secno = cpu_to_le32(fs);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ brelse(bh2);
+ hpfs_free_sectors(s, ra, 1);
+ if ((anode = hpfs_map_anode(s, na, &bh))) {
+ anode->up = cpu_to_le32(up);
+ if (up == node && fnod)
+ anode->btree.flags |= BP_fnode_parent;
+ else
+ anode->btree.flags &= ~BP_fnode_parent;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ return se;
+ }
+ up = up != node ? le32_to_cpu(anode->up) : -1;
+ btree->u.internal[btree->n_used_nodes - 1].file_secno = cpu_to_le32(/*fs*/-1);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ a = na;
+ if ((new_anode = hpfs_alloc_anode(s, a, &na, &bh))) {
+ anode = new_anode;
+ /*anode->up = cpu_to_le32(up != -1 ? up : ra);*/
+ anode->btree.flags |= BP_internal;
+ anode->btree.n_used_nodes = 1;
+ anode->btree.n_free_nodes = 59;
+ anode->btree.first_free = cpu_to_le16(16);
+ anode->btree.u.internal[0].down = cpu_to_le32(a);
+ anode->btree.u.internal[0].file_secno = cpu_to_le32(-1);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ if ((anode = hpfs_map_anode(s, a, &bh))) {
+ anode->up = cpu_to_le32(na);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ } else na = a;
+ }
+ if ((anode = hpfs_map_anode(s, na, &bh))) {
+ anode->up = cpu_to_le32(node);
+ if (fnod)
+ anode->btree.flags |= BP_fnode_parent;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ if (!fnod) {
+ if (!(anode = hpfs_map_anode(s, node, &bh))) {
+ brelse(bh2);
+ return -1;
+ }
+ btree = &anode->btree;
+ } else {
+ if (!(fnode = hpfs_map_fnode(s, node, &bh))) {
+ brelse(bh2);
+ return -1;
+ }
+ btree = &fnode->btree;
+ }
+ ranode->up = cpu_to_le32(node);
+ memcpy(&ranode->btree, btree, le16_to_cpu(btree->first_free));
+ if (fnod)
+ ranode->btree.flags |= BP_fnode_parent;
+ ranode->btree.n_free_nodes = (bp_internal(&ranode->btree) ? 60 : 40) - ranode->btree.n_used_nodes;
+ if (bp_internal(&ranode->btree)) for (n = 0; n < ranode->btree.n_used_nodes; n++) {
+ struct anode *unode;
+ if ((unode = hpfs_map_anode(s, le32_to_cpu(ranode->u.internal[n].down), &bh1))) {
+ unode->up = cpu_to_le32(ra);
+ unode->btree.flags &= ~BP_fnode_parent;
+ mark_buffer_dirty(bh1);
+ brelse(bh1);
+ }
+ }
+ btree->flags |= BP_internal;
+ btree->n_free_nodes = fnod ? 10 : 58;
+ btree->n_used_nodes = 2;
+ btree->first_free = cpu_to_le16((char *)&btree->u.internal[2] - (char *)btree);
+ btree->u.internal[0].file_secno = cpu_to_le32(fs);
+ btree->u.internal[0].down = cpu_to_le32(ra);
+ btree->u.internal[1].file_secno = cpu_to_le32(-1);
+ btree->u.internal[1].down = cpu_to_le32(na);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ mark_buffer_dirty(bh2);
+ brelse(bh2);
+ return se;
+}
+
+/*
+ * Remove allocation tree. Recursion would look much nicer but
+ * I want to avoid it because it can cause stack overflow.
+ */
+
+void hpfs_remove_btree(struct super_block *s, struct bplus_header *btree)
+{
+ struct bplus_header *btree1 = btree;
+ struct anode *anode = NULL;
+ anode_secno ano = 0, oano;
+ struct buffer_head *bh;
+ int level = 0;
+ int pos = 0;
+ int i;
+ int c1, c2 = 0;
+ int d1, d2;
+ go_down:
+ d2 = 0;
+ while (bp_internal(btree1)) {
+ ano = le32_to_cpu(btree1->u.internal[pos].down);
+ if (level) brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, ano, &d1, &d2, "hpfs_remove_btree #1"))
+ return;
+ if (!(anode = hpfs_map_anode(s, ano, &bh))) return;
+ btree1 = &anode->btree;
+ level++;
+ pos = 0;
+ }
+ for (i = 0; i < btree1->n_used_nodes; i++)
+ hpfs_free_sectors(s, le32_to_cpu(btree1->u.external[i].disk_secno), le32_to_cpu(btree1->u.external[i].length));
+ go_up:
+ if (!level) return;
+ brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, ano, &c1, &c2, "hpfs_remove_btree #2")) return;
+ hpfs_free_sectors(s, ano, 1);
+ oano = ano;
+ ano = le32_to_cpu(anode->up);
+ if (--level) {
+ if (!(anode = hpfs_map_anode(s, ano, &bh))) return;
+ btree1 = &anode->btree;
+ } else btree1 = btree;
+ for (i = 0; i < btree1->n_used_nodes; i++) {
+ if (le32_to_cpu(btree1->u.internal[i].down) == oano) {
+ if ((pos = i + 1) < btree1->n_used_nodes)
+ goto go_down;
+ else
+ goto go_up;
+ }
+ }
+ hpfs_error(s,
+ "reference to anode %08x not found in anode %08x "
+ "(probably bad up pointer)",
+ oano, level ? ano : -1);
+ if (level)
+ brelse(bh);
+}
+
+/* Just a wrapper around hpfs_bplus_lookup .. used for reading eas */
+
+static secno anode_lookup(struct super_block *s, anode_secno a, unsigned sec)
+{
+ struct anode *anode;
+ struct buffer_head *bh;
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return -1;
+ return hpfs_bplus_lookup(s, NULL, &anode->btree, sec, bh);
+}
+
+int hpfs_ea_read(struct super_block *s, secno a, int ano, unsigned pos,
+ unsigned len, char *buf)
+{
+ struct buffer_head *bh;
+ char *data;
+ secno sec;
+ unsigned l;
+ while (len) {
+ if (ano) {
+ if ((sec = anode_lookup(s, a, pos >> 9)) == -1)
+ return -1;
+ } else sec = a + (pos >> 9);
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, sec, 1, "ea #1")) return -1;
+ if (!(data = hpfs_map_sector(s, sec, &bh, (len - 1) >> 9)))
+ return -1;
+ l = 0x200 - (pos & 0x1ff); if (l > len) l = len;
+ memcpy(buf, data + (pos & 0x1ff), l);
+ brelse(bh);
+ buf += l; pos += l; len -= l;
+ }
+ return 0;
+}
+
+int hpfs_ea_write(struct super_block *s, secno a, int ano, unsigned pos,
+ unsigned len, const char *buf)
+{
+ struct buffer_head *bh;
+ char *data;
+ secno sec;
+ unsigned l;
+ while (len) {
+ if (ano) {
+ if ((sec = anode_lookup(s, a, pos >> 9)) == -1)
+ return -1;
+ } else sec = a + (pos >> 9);
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, sec, 1, "ea #2")) return -1;
+ if (!(data = hpfs_map_sector(s, sec, &bh, (len - 1) >> 9)))
+ return -1;
+ l = 0x200 - (pos & 0x1ff); if (l > len) l = len;
+ memcpy(data + (pos & 0x1ff), buf, l);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ buf += l; pos += l; len -= l;
+ }
+ return 0;
+}
+
+void hpfs_ea_remove(struct super_block *s, secno a, int ano, unsigned len)
+{
+ struct anode *anode;
+ struct buffer_head *bh;
+ if (ano) {
+ if (!(anode = hpfs_map_anode(s, a, &bh))) return;
+ hpfs_remove_btree(s, &anode->btree);
+ brelse(bh);
+ hpfs_free_sectors(s, a, 1);
+ } else hpfs_free_sectors(s, a, (len + 511) >> 9);
+}
+
+/* Truncate allocation tree. Doesn't join anodes - I hope it doesn't matter */
+
+void hpfs_truncate_btree(struct super_block *s, secno f, int fno, unsigned secs)
+{
+ struct fnode *fnode;
+ struct anode *anode;
+ struct buffer_head *bh;
+ struct bplus_header *btree;
+ anode_secno node = f;
+ int i, j, nodes;
+ int c1, c2 = 0;
+ if (fno) {
+ if (!(fnode = hpfs_map_fnode(s, f, &bh))) return;
+ btree = &fnode->btree;
+ } else {
+ if (!(anode = hpfs_map_anode(s, f, &bh))) return;
+ btree = &anode->btree;
+ }
+ if (!secs) {
+ hpfs_remove_btree(s, btree);
+ if (fno) {
+ btree->n_free_nodes = 8;
+ btree->n_used_nodes = 0;
+ btree->first_free = cpu_to_le16(8);
+ btree->flags &= ~BP_internal;
+ mark_buffer_dirty(bh);
+ } else hpfs_free_sectors(s, f, 1);
+ brelse(bh);
+ return;
+ }
+ while (bp_internal(btree)) {
+ nodes = btree->n_used_nodes + btree->n_free_nodes;
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (le32_to_cpu(btree->u.internal[i].file_secno) >= secs) goto f;
+ brelse(bh);
+ hpfs_error(s, "internal btree %08x doesn't end with -1", node);
+ return;
+ f:
+ for (j = i + 1; j < btree->n_used_nodes; j++)
+ hpfs_ea_remove(s, le32_to_cpu(btree->u.internal[j].down), 1, 0);
+ btree->n_used_nodes = i + 1;
+ btree->n_free_nodes = nodes - btree->n_used_nodes;
+ btree->first_free = cpu_to_le16(8 + 8 * btree->n_used_nodes);
+ mark_buffer_dirty(bh);
+ if (btree->u.internal[i].file_secno == cpu_to_le32(secs)) {
+ brelse(bh);
+ return;
+ }
+ node = le32_to_cpu(btree->u.internal[i].down);
+ brelse(bh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, node, &c1, &c2, "hpfs_truncate_btree"))
+ return;
+ if (!(anode = hpfs_map_anode(s, node, &bh))) return;
+ btree = &anode->btree;
+ }
+ nodes = btree->n_used_nodes + btree->n_free_nodes;
+ for (i = 0; i < btree->n_used_nodes; i++)
+ if (le32_to_cpu(btree->u.external[i].file_secno) + le32_to_cpu(btree->u.external[i].length) >= secs) goto ff;
+ brelse(bh);
+ return;
+ ff:
+ if (secs <= le32_to_cpu(btree->u.external[i].file_secno)) {
+ hpfs_error(s, "there is an allocation error in file %08x, sector %08x", f, secs);
+ if (i) i--;
+ }
+ else if (le32_to_cpu(btree->u.external[i].file_secno) + le32_to_cpu(btree->u.external[i].length) > secs) {
+ hpfs_free_sectors(s, le32_to_cpu(btree->u.external[i].disk_secno) + secs -
+ le32_to_cpu(btree->u.external[i].file_secno), le32_to_cpu(btree->u.external[i].length)
+ - secs + le32_to_cpu(btree->u.external[i].file_secno)); /* I hope gcc optimizes this :-) */
+ btree->u.external[i].length = cpu_to_le32(secs - le32_to_cpu(btree->u.external[i].file_secno));
+ }
+ for (j = i + 1; j < btree->n_used_nodes; j++)
+ hpfs_free_sectors(s, le32_to_cpu(btree->u.external[j].disk_secno), le32_to_cpu(btree->u.external[j].length));
+ btree->n_used_nodes = i + 1;
+ btree->n_free_nodes = nodes - btree->n_used_nodes;
+ btree->first_free = cpu_to_le16(8 + 12 * btree->n_used_nodes);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+}
+
+/* Remove file or directory and it's eas - note that directory must
+ be empty when this is called. */
+
+void hpfs_remove_fnode(struct super_block *s, fnode_secno fno)
+{
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ struct extended_attribute *ea;
+ struct extended_attribute *ea_end;
+ if (!(fnode = hpfs_map_fnode(s, fno, &bh))) return;
+ if (!fnode_is_dir(fnode)) hpfs_remove_btree(s, &fnode->btree);
+ else hpfs_remove_dtree(s, le32_to_cpu(fnode->u.external[0].disk_secno));
+ ea_end = fnode_end_ea(fnode);
+ for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+ if (ea_indirect(ea))
+ hpfs_ea_remove(s, ea_sec(ea), ea_in_anode(ea), ea_len(ea));
+ hpfs_ea_ext_remove(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l));
+ brelse(bh);
+ hpfs_free_sectors(s, fno, 1);
+}
diff --git a/fs/hpfs/buffer.c b/fs/hpfs/buffer.c
new file mode 100644
index 000000000..d39246865
--- /dev/null
+++ b/fs/hpfs/buffer.c
@@ -0,0 +1,232 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/buffer.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * general buffer i/o
+ */
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/blkdev.h>
+#include "hpfs_fn.h"
+
+secno hpfs_search_hotfix_map(struct super_block *s, secno sec)
+{
+ unsigned i;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ for (i = 0; unlikely(i < sbi->n_hotfixes); i++) {
+ if (sbi->hotfix_from[i] == sec) {
+ return sbi->hotfix_to[i];
+ }
+ }
+ return sec;
+}
+
+unsigned hpfs_search_hotfix_map_for_range(struct super_block *s, secno sec, unsigned n)
+{
+ unsigned i;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ for (i = 0; unlikely(i < sbi->n_hotfixes); i++) {
+ if (sbi->hotfix_from[i] >= sec && sbi->hotfix_from[i] < sec + n) {
+ n = sbi->hotfix_from[i] - sec;
+ }
+ }
+ return n;
+}
+
+void hpfs_prefetch_sectors(struct super_block *s, unsigned secno, int n)
+{
+ struct buffer_head *bh;
+ struct blk_plug plug;
+
+ if (n <= 0 || unlikely(secno >= hpfs_sb(s)->sb_fs_size))
+ return;
+
+ if (unlikely(hpfs_search_hotfix_map_for_range(s, secno, n) != n))
+ return;
+
+ bh = sb_find_get_block(s, secno);
+ if (bh) {
+ if (buffer_uptodate(bh)) {
+ brelse(bh);
+ return;
+ }
+ brelse(bh);
+ }
+
+ blk_start_plug(&plug);
+ while (n > 0) {
+ if (unlikely(secno >= hpfs_sb(s)->sb_fs_size))
+ break;
+ sb_breadahead(s, secno);
+ secno++;
+ n--;
+ }
+ blk_finish_plug(&plug);
+}
+
+/* Map a sector into a buffer and return pointers to it and to the buffer. */
+
+void *hpfs_map_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp,
+ int ahead)
+{
+ struct buffer_head *bh;
+
+ hpfs_lock_assert(s);
+
+ hpfs_prefetch_sectors(s, secno, ahead);
+
+ cond_resched();
+
+ *bhp = bh = sb_bread(s, hpfs_search_hotfix_map(s, secno));
+ if (bh != NULL)
+ return bh->b_data;
+ else {
+ pr_err("%s(): read error\n", __func__);
+ return NULL;
+ }
+}
+
+/* Like hpfs_map_sector but don't read anything */
+
+void *hpfs_get_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp)
+{
+ struct buffer_head *bh;
+ /*return hpfs_map_sector(s, secno, bhp, 0);*/
+
+ hpfs_lock_assert(s);
+
+ cond_resched();
+
+ if ((*bhp = bh = sb_getblk(s, hpfs_search_hotfix_map(s, secno))) != NULL) {
+ if (!buffer_uptodate(bh)) wait_on_buffer(bh);
+ set_buffer_uptodate(bh);
+ return bh->b_data;
+ } else {
+ pr_err("%s(): getblk failed\n", __func__);
+ return NULL;
+ }
+}
+
+/* Map 4 sectors into a 4buffer and return pointers to it and to the buffer. */
+
+void *hpfs_map_4sectors(struct super_block *s, unsigned secno, struct quad_buffer_head *qbh,
+ int ahead)
+{
+ char *data;
+
+ hpfs_lock_assert(s);
+
+ cond_resched();
+
+ if (secno & 3) {
+ pr_err("%s(): unaligned read\n", __func__);
+ return NULL;
+ }
+
+ hpfs_prefetch_sectors(s, secno, 4 + ahead);
+
+ if (!hpfs_map_sector(s, secno + 0, &qbh->bh[0], 0)) goto bail0;
+ if (!hpfs_map_sector(s, secno + 1, &qbh->bh[1], 0)) goto bail1;
+ if (!hpfs_map_sector(s, secno + 2, &qbh->bh[2], 0)) goto bail2;
+ if (!hpfs_map_sector(s, secno + 3, &qbh->bh[3], 0)) goto bail3;
+
+ if (likely(qbh->bh[1]->b_data == qbh->bh[0]->b_data + 1 * 512) &&
+ likely(qbh->bh[2]->b_data == qbh->bh[0]->b_data + 2 * 512) &&
+ likely(qbh->bh[3]->b_data == qbh->bh[0]->b_data + 3 * 512)) {
+ return qbh->data = qbh->bh[0]->b_data;
+ }
+
+ qbh->data = data = kmalloc(2048, GFP_NOFS);
+ if (!data) {
+ pr_err("%s(): out of memory\n", __func__);
+ goto bail4;
+ }
+
+ memcpy(data + 0 * 512, qbh->bh[0]->b_data, 512);
+ memcpy(data + 1 * 512, qbh->bh[1]->b_data, 512);
+ memcpy(data + 2 * 512, qbh->bh[2]->b_data, 512);
+ memcpy(data + 3 * 512, qbh->bh[3]->b_data, 512);
+
+ return data;
+
+ bail4:
+ brelse(qbh->bh[3]);
+ bail3:
+ brelse(qbh->bh[2]);
+ bail2:
+ brelse(qbh->bh[1]);
+ bail1:
+ brelse(qbh->bh[0]);
+ bail0:
+ return NULL;
+}
+
+/* Don't read sectors */
+
+void *hpfs_get_4sectors(struct super_block *s, unsigned secno,
+ struct quad_buffer_head *qbh)
+{
+ cond_resched();
+
+ hpfs_lock_assert(s);
+
+ if (secno & 3) {
+ pr_err("%s(): unaligned read\n", __func__);
+ return NULL;
+ }
+
+ if (!hpfs_get_sector(s, secno + 0, &qbh->bh[0])) goto bail0;
+ if (!hpfs_get_sector(s, secno + 1, &qbh->bh[1])) goto bail1;
+ if (!hpfs_get_sector(s, secno + 2, &qbh->bh[2])) goto bail2;
+ if (!hpfs_get_sector(s, secno + 3, &qbh->bh[3])) goto bail3;
+
+ if (likely(qbh->bh[1]->b_data == qbh->bh[0]->b_data + 1 * 512) &&
+ likely(qbh->bh[2]->b_data == qbh->bh[0]->b_data + 2 * 512) &&
+ likely(qbh->bh[3]->b_data == qbh->bh[0]->b_data + 3 * 512)) {
+ return qbh->data = qbh->bh[0]->b_data;
+ }
+
+ if (!(qbh->data = kmalloc(2048, GFP_NOFS))) {
+ pr_err("%s(): out of memory\n", __func__);
+ goto bail4;
+ }
+ return qbh->data;
+
+bail4:
+ brelse(qbh->bh[3]);
+bail3:
+ brelse(qbh->bh[2]);
+bail2:
+ brelse(qbh->bh[1]);
+bail1:
+ brelse(qbh->bh[0]);
+bail0:
+ return NULL;
+}
+
+
+void hpfs_brelse4(struct quad_buffer_head *qbh)
+{
+ if (unlikely(qbh->data != qbh->bh[0]->b_data))
+ kfree(qbh->data);
+ brelse(qbh->bh[0]);
+ brelse(qbh->bh[1]);
+ brelse(qbh->bh[2]);
+ brelse(qbh->bh[3]);
+}
+
+void hpfs_mark_4buffers_dirty(struct quad_buffer_head *qbh)
+{
+ if (unlikely(qbh->data != qbh->bh[0]->b_data)) {
+ memcpy(qbh->bh[0]->b_data, qbh->data + 0 * 512, 512);
+ memcpy(qbh->bh[1]->b_data, qbh->data + 1 * 512, 512);
+ memcpy(qbh->bh[2]->b_data, qbh->data + 2 * 512, 512);
+ memcpy(qbh->bh[3]->b_data, qbh->data + 3 * 512, 512);
+ }
+ mark_buffer_dirty(qbh->bh[0]);
+ mark_buffer_dirty(qbh->bh[1]);
+ mark_buffer_dirty(qbh->bh[2]);
+ mark_buffer_dirty(qbh->bh[3]);
+}
diff --git a/fs/hpfs/dentry.c b/fs/hpfs/dentry.c
new file mode 100644
index 000000000..89a36fdc6
--- /dev/null
+++ b/fs/hpfs/dentry.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/dentry.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * dcache operations
+ */
+
+#include "hpfs_fn.h"
+
+/*
+ * Note: the dentry argument is the parent dentry.
+ */
+
+static int hpfs_hash_dentry(const struct dentry *dentry, struct qstr *qstr)
+{
+ unsigned long hash;
+ int i;
+ unsigned l = qstr->len;
+
+ if (l == 1) if (qstr->name[0]=='.') goto x;
+ if (l == 2) if (qstr->name[0]=='.' || qstr->name[1]=='.') goto x;
+ hpfs_adjust_length(qstr->name, &l);
+ /*if (hpfs_chk_name(qstr->name,&l))*/
+ /*return -ENAMETOOLONG;*/
+ /*return -ENOENT;*/
+ x:
+
+ hash = init_name_hash(dentry);
+ for (i = 0; i < l; i++)
+ hash = partial_name_hash(hpfs_upcase(hpfs_sb(dentry->d_sb)->sb_cp_table,qstr->name[i]), hash);
+ qstr->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+static int hpfs_compare_dentry(const struct dentry *dentry,
+ unsigned int len, const char *str, const struct qstr *name)
+{
+ unsigned al = len;
+ unsigned bl = name->len;
+
+ hpfs_adjust_length(str, &al);
+ /*hpfs_adjust_length(b->name, &bl);*/
+
+ /*
+ * 'str' is the nane of an already existing dentry, so the name
+ * must be valid. 'name' must be validated first.
+ */
+
+ if (hpfs_chk_name(name->name, &bl))
+ return 1;
+ if (hpfs_compare_names(dentry->d_sb, str, al, name->name, bl, 0))
+ return 1;
+ return 0;
+}
+
+const struct dentry_operations hpfs_dentry_operations = {
+ .d_hash = hpfs_hash_dentry,
+ .d_compare = hpfs_compare_dentry,
+};
diff --git a/fs/hpfs/dir.c b/fs/hpfs/dir.c
new file mode 100644
index 000000000..f32f15669
--- /dev/null
+++ b/fs/hpfs/dir.c
@@ -0,0 +1,329 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/dir.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * directory VFS functions
+ */
+
+#include <linux/slab.h>
+#include "hpfs_fn.h"
+
+static int hpfs_dir_release(struct inode *inode, struct file *filp)
+{
+ hpfs_lock(inode->i_sb);
+ hpfs_del_pos(inode, &filp->f_pos);
+ /*hpfs_write_if_changed(inode);*/
+ hpfs_unlock(inode->i_sb);
+ return 0;
+}
+
+/* This is slow, but it's not used often */
+
+static loff_t hpfs_dir_lseek(struct file *filp, loff_t off, int whence)
+{
+ loff_t new_off = off + (whence == 1 ? filp->f_pos : 0);
+ loff_t pos;
+ struct quad_buffer_head qbh;
+ struct inode *i = file_inode(filp);
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ struct super_block *s = i->i_sb;
+
+ /* Somebody else will have to figure out what to do here */
+ if (whence == SEEK_DATA || whence == SEEK_HOLE)
+ return -EINVAL;
+
+ inode_lock(i);
+ hpfs_lock(s);
+
+ /*pr_info("dir lseek\n");*/
+ if (new_off == 0 || new_off == 1 || new_off == 11 || new_off == 12 || new_off == 13) goto ok;
+ pos = ((loff_t) hpfs_de_as_down_as_possible(s, hpfs_inode->i_dno) << 4) + 1;
+ while (pos != new_off) {
+ if (map_pos_dirent(i, &pos, &qbh)) hpfs_brelse4(&qbh);
+ else goto fail;
+ if (pos == 12) goto fail;
+ }
+ if (unlikely(hpfs_add_pos(i, &filp->f_pos) < 0)) {
+ hpfs_unlock(s);
+ inode_unlock(i);
+ return -ENOMEM;
+ }
+ok:
+ filp->f_pos = new_off;
+ hpfs_unlock(s);
+ inode_unlock(i);
+ return new_off;
+fail:
+ /*pr_warn("illegal lseek: %016llx\n", new_off);*/
+ hpfs_unlock(s);
+ inode_unlock(i);
+ return -ESPIPE;
+}
+
+static int hpfs_readdir(struct file *file, struct dir_context *ctx)
+{
+ struct inode *inode = file_inode(file);
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de;
+ int lc;
+ loff_t next_pos;
+ unsigned char *tempname;
+ int c1, c2 = 0;
+ int ret = 0;
+
+ hpfs_lock(inode->i_sb);
+
+ if (hpfs_sb(inode->i_sb)->sb_chk) {
+ if (hpfs_chk_sectors(inode->i_sb, inode->i_ino, 1, "dir_fnode")) {
+ ret = -EFSERROR;
+ goto out;
+ }
+ if (hpfs_chk_sectors(inode->i_sb, hpfs_inode->i_dno, 4, "dir_dnode")) {
+ ret = -EFSERROR;
+ goto out;
+ }
+ }
+ if (hpfs_sb(inode->i_sb)->sb_chk >= 2) {
+ struct buffer_head *bh;
+ struct fnode *fno;
+ int e = 0;
+ if (!(fno = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) {
+ ret = -EIOERROR;
+ goto out;
+ }
+ if (!fnode_is_dir(fno)) {
+ e = 1;
+ hpfs_error(inode->i_sb, "not a directory, fnode %08lx",
+ (unsigned long)inode->i_ino);
+ }
+ if (hpfs_inode->i_dno != le32_to_cpu(fno->u.external[0].disk_secno)) {
+ e = 1;
+ hpfs_error(inode->i_sb, "corrupted inode: i_dno == %08x, fnode -> dnode == %08x", hpfs_inode->i_dno, le32_to_cpu(fno->u.external[0].disk_secno));
+ }
+ brelse(bh);
+ if (e) {
+ ret = -EFSERROR;
+ goto out;
+ }
+ }
+ lc = hpfs_sb(inode->i_sb)->sb_lowercase;
+ if (ctx->pos == 12) { /* diff -r requires this (note, that diff -r */
+ ctx->pos = 13; /* also fails on msdos filesystem in 2.0) */
+ goto out;
+ }
+ if (ctx->pos == 13) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ while (1) {
+ again:
+ /* This won't work when cycle is longer than number of dirents
+ accepted by filldir, but what can I do?
+ maybe killall -9 ls helps */
+ if (hpfs_sb(inode->i_sb)->sb_chk)
+ if (hpfs_stop_cycles(inode->i_sb, ctx->pos, &c1, &c2, "hpfs_readdir")) {
+ ret = -EFSERROR;
+ goto out;
+ }
+ if (ctx->pos == 12)
+ goto out;
+ if (ctx->pos == 3 || ctx->pos == 4 || ctx->pos == 5) {
+ pr_err("pos==%d\n", (int)ctx->pos);
+ goto out;
+ }
+ if (ctx->pos == 0) {
+ if (!dir_emit_dot(file, ctx))
+ goto out;
+ ctx->pos = 11;
+ }
+ if (ctx->pos == 11) {
+ if (!dir_emit(ctx, "..", 2, hpfs_inode->i_parent_dir, DT_DIR))
+ goto out;
+ ctx->pos = 1;
+ }
+ if (ctx->pos == 1) {
+ ret = hpfs_add_pos(inode, &file->f_pos);
+ if (unlikely(ret < 0))
+ goto out;
+ ctx->pos = ((loff_t) hpfs_de_as_down_as_possible(inode->i_sb, hpfs_inode->i_dno) << 4) + 1;
+ }
+ next_pos = ctx->pos;
+ if (!(de = map_pos_dirent(inode, &next_pos, &qbh))) {
+ ctx->pos = next_pos;
+ ret = -EIOERROR;
+ goto out;
+ }
+ if (de->first || de->last) {
+ if (hpfs_sb(inode->i_sb)->sb_chk) {
+ if (de->first && !de->last && (de->namelen != 2
+ || de ->name[0] != 1 || de->name[1] != 1))
+ hpfs_error(inode->i_sb, "hpfs_readdir: bad ^A^A entry; pos = %08lx", (unsigned long)ctx->pos);
+ if (de->last && (de->namelen != 1 || de ->name[0] != 255))
+ hpfs_error(inode->i_sb, "hpfs_readdir: bad \\377 entry; pos = %08lx", (unsigned long)ctx->pos);
+ }
+ hpfs_brelse4(&qbh);
+ ctx->pos = next_pos;
+ goto again;
+ }
+ tempname = hpfs_translate_name(inode->i_sb, de->name, de->namelen, lc, de->not_8x3);
+ if (!dir_emit(ctx, tempname, de->namelen, le32_to_cpu(de->fnode), DT_UNKNOWN)) {
+ if (tempname != de->name) kfree(tempname);
+ hpfs_brelse4(&qbh);
+ goto out;
+ }
+ ctx->pos = next_pos;
+ if (tempname != de->name) kfree(tempname);
+ hpfs_brelse4(&qbh);
+ }
+out:
+ hpfs_unlock(inode->i_sb);
+ return ret;
+}
+
+/*
+ * lookup. Search the specified directory for the specified name, set
+ * *result to the corresponding inode.
+ *
+ * lookup uses the inode number to tell read_inode whether it is reading
+ * the inode of a directory or a file -- file ino's are odd, directory
+ * ino's are even. read_inode avoids i/o for file inodes; everything
+ * needed is up here in the directory. (And file fnodes are out in
+ * the boondocks.)
+ *
+ * - M.P.: this is over, sometimes we've got to read file's fnode for eas
+ * inode numbers are just fnode sector numbers; iget lock is used
+ * to tell read_inode to read fnode or not.
+ */
+
+struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de;
+ ino_t ino;
+ int err;
+ struct inode *result = NULL;
+ struct hpfs_inode_info *hpfs_result;
+
+ hpfs_lock(dir->i_sb);
+ if ((err = hpfs_chk_name(name, &len))) {
+ if (err == -ENAMETOOLONG) {
+ hpfs_unlock(dir->i_sb);
+ return ERR_PTR(-ENAMETOOLONG);
+ }
+ goto end_add;
+ }
+
+ /*
+ * '.' and '..' will never be passed here.
+ */
+
+ de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, NULL, &qbh);
+
+ /*
+ * This is not really a bailout, just means file not found.
+ */
+
+ if (!de) goto end;
+
+ /*
+ * Get inode number, what we're after.
+ */
+
+ ino = le32_to_cpu(de->fnode);
+
+ /*
+ * Go find or make an inode.
+ */
+
+ result = iget_locked(dir->i_sb, ino);
+ if (!result) {
+ hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
+ result = ERR_PTR(-ENOMEM);
+ goto bail1;
+ }
+ if (result->i_state & I_NEW) {
+ hpfs_init_inode(result);
+ if (de->directory)
+ hpfs_read_inode(result);
+ else if (le32_to_cpu(de->ea_size) && hpfs_sb(dir->i_sb)->sb_eas)
+ hpfs_read_inode(result);
+ else {
+ result->i_mode |= S_IFREG;
+ result->i_mode &= ~0111;
+ result->i_op = &hpfs_file_iops;
+ result->i_fop = &hpfs_file_ops;
+ set_nlink(result, 1);
+ }
+ unlock_new_inode(result);
+ }
+ hpfs_result = hpfs_i(result);
+ if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino;
+
+ if (de->has_acl || de->has_xtd_perm) if (!sb_rdonly(dir->i_sb)) {
+ hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
+ iput(result);
+ result = ERR_PTR(-EINVAL);
+ goto bail1;
+ }
+
+ /*
+ * Fill in the info from the directory if this is a newly created
+ * inode.
+ */
+
+ if (!result->i_ctime.tv_sec) {
+ if (!(result->i_ctime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->creation_date))))
+ result->i_ctime.tv_sec = 1;
+ result->i_ctime.tv_nsec = 0;
+ result->i_mtime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->write_date));
+ result->i_mtime.tv_nsec = 0;
+ result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->read_date));
+ result->i_atime.tv_nsec = 0;
+ hpfs_result->i_ea_size = le32_to_cpu(de->ea_size);
+ if (!hpfs_result->i_ea_mode && de->read_only)
+ result->i_mode &= ~0222;
+ if (!de->directory) {
+ if (result->i_size == -1) {
+ result->i_size = le32_to_cpu(de->file_size);
+ result->i_data.a_ops = &hpfs_aops;
+ hpfs_i(result)->mmu_private = result->i_size;
+ /*
+ * i_blocks should count the fnode and any anodes.
+ * We count 1 for the fnode and don't bother about
+ * anodes -- the disk heads are on the directory band
+ * and we want them to stay there.
+ */
+ result->i_blocks = 1 + ((result->i_size + 511) >> 9);
+ }
+ }
+ }
+
+bail1:
+ hpfs_brelse4(&qbh);
+
+ /*
+ * Made it.
+ */
+
+end:
+end_add:
+ hpfs_unlock(dir->i_sb);
+ return d_splice_alias(result, dentry);
+}
+
+const struct file_operations hpfs_dir_ops =
+{
+ .llseek = hpfs_dir_lseek,
+ .read = generic_read_dir,
+ .iterate_shared = hpfs_readdir,
+ .release = hpfs_dir_release,
+ .fsync = hpfs_file_fsync,
+ .unlocked_ioctl = hpfs_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+};
diff --git a/fs/hpfs/dnode.c b/fs/hpfs/dnode.c
new file mode 100644
index 000000000..4ada525c5
--- /dev/null
+++ b/fs/hpfs/dnode.c
@@ -0,0 +1,1095 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/dnode.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * handling directory dnode tree - adding, deleteing & searching for dirents
+ */
+
+#include "hpfs_fn.h"
+
+static loff_t get_pos(struct dnode *d, struct hpfs_dirent *fde)
+{
+ struct hpfs_dirent *de;
+ struct hpfs_dirent *de_end = dnode_end_de(d);
+ int i = 1;
+ for (de = dnode_first_de(d); de < de_end; de = de_next_de(de)) {
+ if (de == fde) return ((loff_t) le32_to_cpu(d->self) << 4) | (loff_t)i;
+ i++;
+ }
+ pr_info("%s(): not_found\n", __func__);
+ return ((loff_t)le32_to_cpu(d->self) << 4) | (loff_t)1;
+}
+
+int hpfs_add_pos(struct inode *inode, loff_t *pos)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ int i = 0;
+ loff_t **ppos;
+
+ if (hpfs_inode->i_rddir_off)
+ for (; hpfs_inode->i_rddir_off[i]; i++)
+ if (hpfs_inode->i_rddir_off[i] == pos)
+ return 0;
+ if (!(i&0x0f)) {
+ ppos = kmalloc_array(i + 0x11, sizeof(loff_t *), GFP_NOFS);
+ if (!ppos) {
+ pr_err("out of memory for position list\n");
+ return -ENOMEM;
+ }
+ if (hpfs_inode->i_rddir_off) {
+ memcpy(ppos, hpfs_inode->i_rddir_off, i * sizeof(loff_t));
+ kfree(hpfs_inode->i_rddir_off);
+ }
+ hpfs_inode->i_rddir_off = ppos;
+ }
+ hpfs_inode->i_rddir_off[i] = pos;
+ hpfs_inode->i_rddir_off[i + 1] = NULL;
+ return 0;
+}
+
+void hpfs_del_pos(struct inode *inode, loff_t *pos)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ loff_t **i, **j;
+
+ if (!hpfs_inode->i_rddir_off) goto not_f;
+ for (i = hpfs_inode->i_rddir_off; *i; i++) if (*i == pos) goto fnd;
+ goto not_f;
+ fnd:
+ for (j = i + 1; *j; j++) ;
+ *i = *(j - 1);
+ *(j - 1) = NULL;
+ if (j - 1 == hpfs_inode->i_rddir_off) {
+ kfree(hpfs_inode->i_rddir_off);
+ hpfs_inode->i_rddir_off = NULL;
+ }
+ return;
+ not_f:
+ /*pr_warn("position pointer %p->%08x not found\n",
+ pos, (int)*pos);*/
+ return;
+}
+
+static void for_all_poss(struct inode *inode, void (*f)(loff_t *, loff_t, loff_t),
+ loff_t p1, loff_t p2)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ loff_t **i;
+
+ if (!hpfs_inode->i_rddir_off) return;
+ for (i = hpfs_inode->i_rddir_off; *i; i++) (*f)(*i, p1, p2);
+ return;
+}
+
+static void hpfs_pos_subst(loff_t *p, loff_t f, loff_t t)
+{
+ if (*p == f) *p = t;
+}
+
+/*void hpfs_hpfs_pos_substd(loff_t *p, loff_t f, loff_t t)
+{
+ if ((*p & ~0x3f) == (f & ~0x3f)) *p = (t & ~0x3f) | (*p & 0x3f);
+}*/
+
+static void hpfs_pos_ins(loff_t *p, loff_t d, loff_t c)
+{
+ if ((*p & ~0x3f) == (d & ~0x3f) && (*p & 0x3f) >= (d & 0x3f)) {
+ int n = (*p & 0x3f) + c;
+ if (n > 0x3f)
+ pr_err("%s(): %08x + %d\n",
+ __func__, (int)*p, (int)c >> 8);
+ else
+ *p = (*p & ~0x3f) | n;
+ }
+}
+
+static void hpfs_pos_del(loff_t *p, loff_t d, loff_t c)
+{
+ if ((*p & ~0x3f) == (d & ~0x3f) && (*p & 0x3f) >= (d & 0x3f)) {
+ int n = (*p & 0x3f) - c;
+ if (n < 1)
+ pr_err("%s(): %08x - %d\n",
+ __func__, (int)*p, (int)c >> 8);
+ else
+ *p = (*p & ~0x3f) | n;
+ }
+}
+
+static struct hpfs_dirent *dnode_pre_last_de(struct dnode *d)
+{
+ struct hpfs_dirent *de, *de_end, *dee = NULL, *deee = NULL;
+ de_end = dnode_end_de(d);
+ for (de = dnode_first_de(d); de < de_end; de = de_next_de(de)) {
+ deee = dee; dee = de;
+ }
+ return deee;
+}
+
+static struct hpfs_dirent *dnode_last_de(struct dnode *d)
+{
+ struct hpfs_dirent *de, *de_end, *dee = NULL;
+ de_end = dnode_end_de(d);
+ for (de = dnode_first_de(d); de < de_end; de = de_next_de(de)) {
+ dee = de;
+ }
+ return dee;
+}
+
+static void set_last_pointer(struct super_block *s, struct dnode *d, dnode_secno ptr)
+{
+ struct hpfs_dirent *de;
+ if (!(de = dnode_last_de(d))) {
+ hpfs_error(s, "set_last_pointer: empty dnode %08x", le32_to_cpu(d->self));
+ return;
+ }
+ if (hpfs_sb(s)->sb_chk) {
+ if (de->down) {
+ hpfs_error(s, "set_last_pointer: dnode %08x has already last pointer %08x",
+ le32_to_cpu(d->self), de_down_pointer(de));
+ return;
+ }
+ if (le16_to_cpu(de->length) != 32) {
+ hpfs_error(s, "set_last_pointer: bad last dirent in dnode %08x", le32_to_cpu(d->self));
+ return;
+ }
+ }
+ if (ptr) {
+ le32_add_cpu(&d->first_free, 4);
+ if (le32_to_cpu(d->first_free) > 2048) {
+ hpfs_error(s, "set_last_pointer: too long dnode %08x", le32_to_cpu(d->self));
+ le32_add_cpu(&d->first_free, -4);
+ return;
+ }
+ de->length = cpu_to_le16(36);
+ de->down = 1;
+ *(__le32 *)((char *)de + 32) = cpu_to_le32(ptr);
+ }
+}
+
+/* Add an entry to dnode and don't care if it grows over 2048 bytes */
+
+struct hpfs_dirent *hpfs_add_de(struct super_block *s, struct dnode *d,
+ const unsigned char *name,
+ unsigned namelen, secno down_ptr)
+{
+ struct hpfs_dirent *de;
+ struct hpfs_dirent *de_end = dnode_end_de(d);
+ unsigned d_size = de_size(namelen, down_ptr);
+ for (de = dnode_first_de(d); de < de_end; de = de_next_de(de)) {
+ int c = hpfs_compare_names(s, name, namelen, de->name, de->namelen, de->last);
+ if (!c) {
+ hpfs_error(s, "name (%c,%d) already exists in dnode %08x", *name, namelen, le32_to_cpu(d->self));
+ return NULL;
+ }
+ if (c < 0) break;
+ }
+ memmove((char *)de + d_size, de, (char *)de_end - (char *)de);
+ memset(de, 0, d_size);
+ if (down_ptr) {
+ *(__le32 *)((char *)de + d_size - 4) = cpu_to_le32(down_ptr);
+ de->down = 1;
+ }
+ de->length = cpu_to_le16(d_size);
+ de->not_8x3 = hpfs_is_name_long(name, namelen);
+ de->namelen = namelen;
+ memcpy(de->name, name, namelen);
+ le32_add_cpu(&d->first_free, d_size);
+ return de;
+}
+
+/* Delete dirent and don't care about its subtree */
+
+static void hpfs_delete_de(struct super_block *s, struct dnode *d,
+ struct hpfs_dirent *de)
+{
+ if (de->last) {
+ hpfs_error(s, "attempt to delete last dirent in dnode %08x", le32_to_cpu(d->self));
+ return;
+ }
+ d->first_free = cpu_to_le32(le32_to_cpu(d->first_free) - le16_to_cpu(de->length));
+ memmove(de, de_next_de(de), le32_to_cpu(d->first_free) + (char *)d - (char *)de);
+}
+
+static void fix_up_ptrs(struct super_block *s, struct dnode *d)
+{
+ struct hpfs_dirent *de;
+ struct hpfs_dirent *de_end = dnode_end_de(d);
+ dnode_secno dno = le32_to_cpu(d->self);
+ for (de = dnode_first_de(d); de < de_end; de = de_next_de(de))
+ if (de->down) {
+ struct quad_buffer_head qbh;
+ struct dnode *dd;
+ if ((dd = hpfs_map_dnode(s, de_down_pointer(de), &qbh))) {
+ if (le32_to_cpu(dd->up) != dno || dd->root_dnode) {
+ dd->up = cpu_to_le32(dno);
+ dd->root_dnode = 0;
+ hpfs_mark_4buffers_dirty(&qbh);
+ }
+ hpfs_brelse4(&qbh);
+ }
+ }
+}
+
+/* Add an entry to dnode and do dnode splitting if required */
+
+static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
+ const unsigned char *name, unsigned namelen,
+ struct hpfs_dirent *new_de, dnode_secno down_ptr)
+{
+ struct quad_buffer_head qbh, qbh1, qbh2;
+ struct dnode *d, *ad, *rd, *nd = NULL;
+ dnode_secno adno, rdno;
+ struct hpfs_dirent *de;
+ struct hpfs_dirent nde;
+ unsigned char *nname;
+ int h;
+ int pos;
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ int c1, c2 = 0;
+ if (!(nname = kmalloc(256, GFP_NOFS))) {
+ pr_err("out of memory, can't add to dnode\n");
+ return 1;
+ }
+ go_up:
+ if (namelen >= 256) {
+ hpfs_error(i->i_sb, "%s(): namelen == %d", __func__, namelen);
+ kfree(nd);
+ kfree(nname);
+ return 1;
+ }
+ if (!(d = hpfs_map_dnode(i->i_sb, dno, &qbh))) {
+ kfree(nd);
+ kfree(nname);
+ return 1;
+ }
+ go_up_a:
+ if (hpfs_sb(i->i_sb)->sb_chk)
+ if (hpfs_stop_cycles(i->i_sb, dno, &c1, &c2, "hpfs_add_to_dnode")) {
+ hpfs_brelse4(&qbh);
+ kfree(nd);
+ kfree(nname);
+ return 1;
+ }
+ if (le32_to_cpu(d->first_free) + de_size(namelen, down_ptr) <= 2048) {
+ loff_t t;
+ copy_de(de=hpfs_add_de(i->i_sb, d, name, namelen, down_ptr), new_de);
+ t = get_pos(d, de);
+ for_all_poss(i, hpfs_pos_ins, t, 1);
+ for_all_poss(i, hpfs_pos_subst, 4, t);
+ for_all_poss(i, hpfs_pos_subst, 5, t + 1);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ kfree(nd);
+ kfree(nname);
+ return 0;
+ }
+ if (!nd) if (!(nd = kmalloc(0x924, GFP_NOFS))) {
+ /* 0x924 is a max size of dnode after adding a dirent with
+ max name length. We alloc this only once. There must
+ not be any error while splitting dnodes, otherwise the
+ whole directory, not only file we're adding, would
+ be lost. */
+ pr_err("out of memory for dnode splitting\n");
+ hpfs_brelse4(&qbh);
+ kfree(nname);
+ return 1;
+ }
+ memcpy(nd, d, le32_to_cpu(d->first_free));
+ copy_de(de = hpfs_add_de(i->i_sb, nd, name, namelen, down_ptr), new_de);
+ for_all_poss(i, hpfs_pos_ins, get_pos(nd, de), 1);
+ h = ((char *)dnode_last_de(nd) - (char *)nd) / 2 + 10;
+ if (!(ad = hpfs_alloc_dnode(i->i_sb, le32_to_cpu(d->up), &adno, &qbh1))) {
+ hpfs_error(i->i_sb, "unable to alloc dnode - dnode tree will be corrupted");
+ hpfs_brelse4(&qbh);
+ kfree(nd);
+ kfree(nname);
+ return 1;
+ }
+ i->i_size += 2048;
+ i->i_blocks += 4;
+ pos = 1;
+ for (de = dnode_first_de(nd); (char *)de_next_de(de) - (char *)nd < h; de = de_next_de(de)) {
+ copy_de(hpfs_add_de(i->i_sb, ad, de->name, de->namelen, de->down ? de_down_pointer(de) : 0), de);
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)dno << 4) | pos, ((loff_t)adno << 4) | pos);
+ pos++;
+ }
+ copy_de(new_de = &nde, de);
+ memcpy(nname, de->name, de->namelen);
+ name = nname;
+ namelen = de->namelen;
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)dno << 4) | pos, 4);
+ down_ptr = adno;
+ set_last_pointer(i->i_sb, ad, de->down ? de_down_pointer(de) : 0);
+ de = de_next_de(de);
+ memmove((char *)nd + 20, de, le32_to_cpu(nd->first_free) + (char *)nd - (char *)de);
+ le32_add_cpu(&nd->first_free, -((char *)de - (char *)nd - 20));
+ memcpy(d, nd, le32_to_cpu(nd->first_free));
+ for_all_poss(i, hpfs_pos_del, (loff_t)dno << 4, pos);
+ fix_up_ptrs(i->i_sb, ad);
+ if (!d->root_dnode) {
+ ad->up = d->up;
+ dno = le32_to_cpu(ad->up);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ goto go_up;
+ }
+ if (!(rd = hpfs_alloc_dnode(i->i_sb, le32_to_cpu(d->up), &rdno, &qbh2))) {
+ hpfs_error(i->i_sb, "unable to alloc dnode - dnode tree will be corrupted");
+ hpfs_brelse4(&qbh);
+ hpfs_brelse4(&qbh1);
+ kfree(nd);
+ kfree(nname);
+ return 1;
+ }
+ i->i_size += 2048;
+ i->i_blocks += 4;
+ rd->root_dnode = 1;
+ rd->up = d->up;
+ if (!(fnode = hpfs_map_fnode(i->i_sb, le32_to_cpu(d->up), &bh))) {
+ hpfs_free_dnode(i->i_sb, rdno);
+ hpfs_brelse4(&qbh);
+ hpfs_brelse4(&qbh1);
+ hpfs_brelse4(&qbh2);
+ kfree(nd);
+ kfree(nname);
+ return 1;
+ }
+ fnode->u.external[0].disk_secno = cpu_to_le32(rdno);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ hpfs_i(i)->i_dno = rdno;
+ d->up = ad->up = cpu_to_le32(rdno);
+ d->root_dnode = ad->root_dnode = 0;
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ qbh = qbh2;
+ set_last_pointer(i->i_sb, rd, dno);
+ dno = rdno;
+ d = rd;
+ goto go_up_a;
+}
+
+/*
+ * Add an entry to directory btree.
+ * I hate such crazy directory structure.
+ * It's easy to read but terrible to write.
+ * I wrote this directory code 4 times.
+ * I hope, now it's finally bug-free.
+ */
+
+int hpfs_add_dirent(struct inode *i,
+ const unsigned char *name, unsigned namelen,
+ struct hpfs_dirent *new_de)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ struct dnode *d;
+ struct hpfs_dirent *de, *de_end;
+ struct quad_buffer_head qbh;
+ dnode_secno dno;
+ int c;
+ int c1, c2 = 0;
+ dno = hpfs_inode->i_dno;
+ down:
+ if (hpfs_sb(i->i_sb)->sb_chk)
+ if (hpfs_stop_cycles(i->i_sb, dno, &c1, &c2, "hpfs_add_dirent")) return 1;
+ if (!(d = hpfs_map_dnode(i->i_sb, dno, &qbh))) return 1;
+ de_end = dnode_end_de(d);
+ for (de = dnode_first_de(d); de < de_end; de = de_next_de(de)) {
+ if (!(c = hpfs_compare_names(i->i_sb, name, namelen, de->name, de->namelen, de->last))) {
+ hpfs_brelse4(&qbh);
+ return -1;
+ }
+ if (c < 0) {
+ if (de->down) {
+ dno = de_down_pointer(de);
+ hpfs_brelse4(&qbh);
+ goto down;
+ }
+ break;
+ }
+ }
+ hpfs_brelse4(&qbh);
+ if (hpfs_check_free_dnodes(i->i_sb, FREE_DNODES_ADD)) {
+ c = 1;
+ goto ret;
+ }
+ c = hpfs_add_to_dnode(i, dno, name, namelen, new_de, 0);
+ ret:
+ return c;
+}
+
+/*
+ * Find dirent with higher name in 'from' subtree and move it to 'to' dnode.
+ * Return the dnode we moved from (to be checked later if it's empty)
+ */
+
+static secno move_to_top(struct inode *i, dnode_secno from, dnode_secno to)
+{
+ dnode_secno dno, ddno;
+ dnode_secno chk_up = to;
+ struct dnode *dnode;
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de, *nde;
+ int a;
+ loff_t t;
+ int c1, c2 = 0;
+ dno = from;
+ while (1) {
+ if (hpfs_sb(i->i_sb)->sb_chk)
+ if (hpfs_stop_cycles(i->i_sb, dno, &c1, &c2, "move_to_top"))
+ return 0;
+ if (!(dnode = hpfs_map_dnode(i->i_sb, dno, &qbh))) return 0;
+ if (hpfs_sb(i->i_sb)->sb_chk) {
+ if (le32_to_cpu(dnode->up) != chk_up) {
+ hpfs_error(i->i_sb, "move_to_top: up pointer from %08x should be %08x, is %08x",
+ dno, chk_up, le32_to_cpu(dnode->up));
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ chk_up = dno;
+ }
+ if (!(de = dnode_last_de(dnode))) {
+ hpfs_error(i->i_sb, "move_to_top: dnode %08x has no last de", dno);
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ if (!de->down) break;
+ dno = de_down_pointer(de);
+ hpfs_brelse4(&qbh);
+ }
+ while (!(de = dnode_pre_last_de(dnode))) {
+ dnode_secno up = le32_to_cpu(dnode->up);
+ hpfs_brelse4(&qbh);
+ hpfs_free_dnode(i->i_sb, dno);
+ i->i_size -= 2048;
+ i->i_blocks -= 4;
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)dno << 4) | 1, 5);
+ if (up == to) return to;
+ if (!(dnode = hpfs_map_dnode(i->i_sb, up, &qbh))) return 0;
+ if (dnode->root_dnode) {
+ hpfs_error(i->i_sb, "move_to_top: got to root_dnode while moving from %08x to %08x", from, to);
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ de = dnode_last_de(dnode);
+ if (!de || !de->down) {
+ hpfs_error(i->i_sb, "move_to_top: dnode %08x doesn't point down to %08x", up, dno);
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ le32_add_cpu(&dnode->first_free, -4);
+ le16_add_cpu(&de->length, -4);
+ de->down = 0;
+ hpfs_mark_4buffers_dirty(&qbh);
+ dno = up;
+ }
+ t = get_pos(dnode, de);
+ for_all_poss(i, hpfs_pos_subst, t, 4);
+ for_all_poss(i, hpfs_pos_subst, t + 1, 5);
+ if (!(nde = kmalloc(le16_to_cpu(de->length), GFP_NOFS))) {
+ hpfs_error(i->i_sb, "out of memory for dirent - directory will be corrupted");
+ hpfs_brelse4(&qbh);
+ return 0;
+ }
+ memcpy(nde, de, le16_to_cpu(de->length));
+ ddno = de->down ? de_down_pointer(de) : 0;
+ hpfs_delete_de(i->i_sb, dnode, de);
+ set_last_pointer(i->i_sb, dnode, ddno);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ a = hpfs_add_to_dnode(i, to, nde->name, nde->namelen, nde, from);
+ kfree(nde);
+ if (a) return 0;
+ return dno;
+}
+
+/*
+ * Check if a dnode is empty and delete it from the tree
+ * (chkdsk doesn't like empty dnodes)
+ */
+
+static void delete_empty_dnode(struct inode *i, dnode_secno dno)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ struct quad_buffer_head qbh;
+ struct dnode *dnode;
+ dnode_secno down, up, ndown;
+ int p;
+ struct hpfs_dirent *de;
+ int c1, c2 = 0;
+ try_it_again:
+ if (hpfs_stop_cycles(i->i_sb, dno, &c1, &c2, "delete_empty_dnode")) return;
+ if (!(dnode = hpfs_map_dnode(i->i_sb, dno, &qbh))) return;
+ if (le32_to_cpu(dnode->first_free) > 56) goto end;
+ if (le32_to_cpu(dnode->first_free) == 52 || le32_to_cpu(dnode->first_free) == 56) {
+ struct hpfs_dirent *de_end;
+ int root = dnode->root_dnode;
+ up = le32_to_cpu(dnode->up);
+ de = dnode_first_de(dnode);
+ down = de->down ? de_down_pointer(de) : 0;
+ if (hpfs_sb(i->i_sb)->sb_chk) if (root && !down) {
+ hpfs_error(i->i_sb, "delete_empty_dnode: root dnode %08x is empty", dno);
+ goto end;
+ }
+ hpfs_brelse4(&qbh);
+ hpfs_free_dnode(i->i_sb, dno);
+ i->i_size -= 2048;
+ i->i_blocks -= 4;
+ if (root) {
+ struct fnode *fnode;
+ struct buffer_head *bh;
+ struct dnode *d1;
+ struct quad_buffer_head qbh1;
+ if (hpfs_sb(i->i_sb)->sb_chk)
+ if (up != i->i_ino) {
+ hpfs_error(i->i_sb,
+ "bad pointer to fnode, dnode %08x, pointing to %08x, should be %08lx",
+ dno, up,
+ (unsigned long)i->i_ino);
+ return;
+ }
+ if ((d1 = hpfs_map_dnode(i->i_sb, down, &qbh1))) {
+ d1->up = cpu_to_le32(up);
+ d1->root_dnode = 1;
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ }
+ if ((fnode = hpfs_map_fnode(i->i_sb, up, &bh))) {
+ fnode->u.external[0].disk_secno = cpu_to_le32(down);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ hpfs_inode->i_dno = down;
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)dno << 4) | 1, (loff_t) 12);
+ return;
+ }
+ if (!(dnode = hpfs_map_dnode(i->i_sb, up, &qbh))) return;
+ p = 1;
+ de_end = dnode_end_de(dnode);
+ for (de = dnode_first_de(dnode); de < de_end; de = de_next_de(de), p++)
+ if (de->down) if (de_down_pointer(de) == dno) goto fnd;
+ hpfs_error(i->i_sb, "delete_empty_dnode: pointer to dnode %08x not found in dnode %08x", dno, up);
+ goto end;
+ fnd:
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)dno << 4) | 1, ((loff_t)up << 4) | p);
+ if (!down) {
+ de->down = 0;
+ le16_add_cpu(&de->length, -4);
+ le32_add_cpu(&dnode->first_free, -4);
+ memmove(de_next_de(de), (char *)de_next_de(de) + 4,
+ (char *)dnode + le32_to_cpu(dnode->first_free) - (char *)de_next_de(de));
+ } else {
+ struct dnode *d1;
+ struct quad_buffer_head qbh1;
+ *(dnode_secno *) ((void *) de + le16_to_cpu(de->length) - 4) = down;
+ if ((d1 = hpfs_map_dnode(i->i_sb, down, &qbh1))) {
+ d1->up = cpu_to_le32(up);
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ }
+ }
+ } else {
+ hpfs_error(i->i_sb, "delete_empty_dnode: dnode %08x, first_free == %03x", dno, le32_to_cpu(dnode->first_free));
+ goto end;
+ }
+
+ if (!de->last) {
+ struct hpfs_dirent *de_next = de_next_de(de);
+ struct hpfs_dirent *de_cp;
+ struct dnode *d1;
+ struct quad_buffer_head qbh1;
+ if (!de_next->down) goto endm;
+ ndown = de_down_pointer(de_next);
+ if (!(de_cp = kmalloc(le16_to_cpu(de->length), GFP_NOFS))) {
+ pr_err("out of memory for dtree balancing\n");
+ goto endm;
+ }
+ memcpy(de_cp, de, le16_to_cpu(de->length));
+ hpfs_delete_de(i->i_sb, dnode, de);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)up << 4) | p, 4);
+ for_all_poss(i, hpfs_pos_del, ((loff_t)up << 4) | p, 1);
+ if (de_cp->down) if ((d1 = hpfs_map_dnode(i->i_sb, de_down_pointer(de_cp), &qbh1))) {
+ d1->up = cpu_to_le32(ndown);
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ }
+ hpfs_add_to_dnode(i, ndown, de_cp->name, de_cp->namelen, de_cp, de_cp->down ? de_down_pointer(de_cp) : 0);
+ /*pr_info("UP-TO-DNODE: %08x (ndown = %08x, down = %08x, dno = %08x)\n",
+ up, ndown, down, dno);*/
+ dno = up;
+ kfree(de_cp);
+ goto try_it_again;
+ } else {
+ struct hpfs_dirent *de_prev = dnode_pre_last_de(dnode);
+ struct hpfs_dirent *de_cp;
+ struct dnode *d1;
+ struct quad_buffer_head qbh1;
+ dnode_secno dlp;
+ if (!de_prev) {
+ hpfs_error(i->i_sb, "delete_empty_dnode: empty dnode %08x", up);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ dno = up;
+ goto try_it_again;
+ }
+ if (!de_prev->down) goto endm;
+ ndown = de_down_pointer(de_prev);
+ if ((d1 = hpfs_map_dnode(i->i_sb, ndown, &qbh1))) {
+ struct hpfs_dirent *del = dnode_last_de(d1);
+ dlp = del->down ? de_down_pointer(del) : 0;
+ if (!dlp && down) {
+ if (le32_to_cpu(d1->first_free) > 2044) {
+ if (hpfs_sb(i->i_sb)->sb_chk >= 2) {
+ pr_err("unbalanced dnode tree, see hpfs.txt 4 more info\n");
+ pr_err("terminating balancing operation\n");
+ }
+ hpfs_brelse4(&qbh1);
+ goto endm;
+ }
+ if (hpfs_sb(i->i_sb)->sb_chk >= 2) {
+ pr_err("unbalanced dnode tree, see hpfs.txt 4 more info\n");
+ pr_err("goin'on\n");
+ }
+ le16_add_cpu(&del->length, 4);
+ del->down = 1;
+ le32_add_cpu(&d1->first_free, 4);
+ }
+ if (dlp && !down) {
+ le16_add_cpu(&del->length, -4);
+ del->down = 0;
+ le32_add_cpu(&d1->first_free, -4);
+ } else if (down)
+ *(__le32 *) ((void *) del + le16_to_cpu(del->length) - 4) = cpu_to_le32(down);
+ } else goto endm;
+ if (!(de_cp = kmalloc(le16_to_cpu(de_prev->length), GFP_NOFS))) {
+ pr_err("out of memory for dtree balancing\n");
+ hpfs_brelse4(&qbh1);
+ goto endm;
+ }
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ memcpy(de_cp, de_prev, le16_to_cpu(de_prev->length));
+ hpfs_delete_de(i->i_sb, dnode, de_prev);
+ if (!de_prev->down) {
+ le16_add_cpu(&de_prev->length, 4);
+ de_prev->down = 1;
+ le32_add_cpu(&dnode->first_free, 4);
+ }
+ *(__le32 *) ((void *) de_prev + le16_to_cpu(de_prev->length) - 4) = cpu_to_le32(ndown);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)up << 4) | (p - 1), 4);
+ for_all_poss(i, hpfs_pos_subst, ((loff_t)up << 4) | p, ((loff_t)up << 4) | (p - 1));
+ if (down) if ((d1 = hpfs_map_dnode(i->i_sb, de_down_pointer(de), &qbh1))) {
+ d1->up = cpu_to_le32(ndown);
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ }
+ hpfs_add_to_dnode(i, ndown, de_cp->name, de_cp->namelen, de_cp, dlp);
+ dno = up;
+ kfree(de_cp);
+ goto try_it_again;
+ }
+ endm:
+ hpfs_mark_4buffers_dirty(&qbh);
+ end:
+ hpfs_brelse4(&qbh);
+}
+
+
+/* Delete dirent from directory */
+
+int hpfs_remove_dirent(struct inode *i, dnode_secno dno, struct hpfs_dirent *de,
+ struct quad_buffer_head *qbh, int depth)
+{
+ struct dnode *dnode = qbh->data;
+ dnode_secno down = 0;
+ loff_t t;
+ if (de->first || de->last) {
+ hpfs_error(i->i_sb, "hpfs_remove_dirent: attempt to delete first or last dirent in dnode %08x", dno);
+ hpfs_brelse4(qbh);
+ return 1;
+ }
+ if (de->down) down = de_down_pointer(de);
+ if (depth && (de->down || (de == dnode_first_de(dnode) && de_next_de(de)->last))) {
+ if (hpfs_check_free_dnodes(i->i_sb, FREE_DNODES_DEL)) {
+ hpfs_brelse4(qbh);
+ return 2;
+ }
+ }
+ for_all_poss(i, hpfs_pos_del, (t = get_pos(dnode, de)) + 1, 1);
+ hpfs_delete_de(i->i_sb, dnode, de);
+ hpfs_mark_4buffers_dirty(qbh);
+ hpfs_brelse4(qbh);
+ if (down) {
+ dnode_secno a = move_to_top(i, down, dno);
+ for_all_poss(i, hpfs_pos_subst, 5, t);
+ if (a) delete_empty_dnode(i, a);
+ return !a;
+ }
+ delete_empty_dnode(i, dno);
+ return 0;
+}
+
+void hpfs_count_dnodes(struct super_block *s, dnode_secno dno, int *n_dnodes,
+ int *n_subdirs, int *n_items)
+{
+ struct dnode *dnode;
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de;
+ dnode_secno ptr, odno = 0;
+ int c1, c2 = 0;
+ int d1, d2 = 0;
+ go_down:
+ if (n_dnodes) (*n_dnodes)++;
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, dno, &c1, &c2, "hpfs_count_dnodes #1")) return;
+ ptr = 0;
+ go_up:
+ if (!(dnode = hpfs_map_dnode(s, dno, &qbh))) return;
+ if (hpfs_sb(s)->sb_chk) if (odno && odno != -1 && le32_to_cpu(dnode->up) != odno)
+ hpfs_error(s, "hpfs_count_dnodes: bad up pointer; dnode %08x, down %08x points to %08x", odno, dno, le32_to_cpu(dnode->up));
+ de = dnode_first_de(dnode);
+ if (ptr) while(1) {
+ if (de->down) if (de_down_pointer(de) == ptr) goto process_de;
+ if (de->last) {
+ hpfs_brelse4(&qbh);
+ hpfs_error(s, "hpfs_count_dnodes: pointer to dnode %08x not found in dnode %08x, got here from %08x",
+ ptr, dno, odno);
+ return;
+ }
+ de = de_next_de(de);
+ }
+ next_de:
+ if (de->down) {
+ odno = dno;
+ dno = de_down_pointer(de);
+ hpfs_brelse4(&qbh);
+ goto go_down;
+ }
+ process_de:
+ if (!de->first && !de->last && de->directory && n_subdirs) (*n_subdirs)++;
+ if (!de->first && !de->last && n_items) (*n_items)++;
+ if ((de = de_next_de(de)) < dnode_end_de(dnode)) goto next_de;
+ ptr = dno;
+ dno = le32_to_cpu(dnode->up);
+ if (dnode->root_dnode) {
+ hpfs_brelse4(&qbh);
+ return;
+ }
+ hpfs_brelse4(&qbh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, ptr, &d1, &d2, "hpfs_count_dnodes #2")) return;
+ odno = -1;
+ goto go_up;
+}
+
+static struct hpfs_dirent *map_nth_dirent(struct super_block *s, dnode_secno dno, int n,
+ struct quad_buffer_head *qbh, struct dnode **dn)
+{
+ int i;
+ struct hpfs_dirent *de, *de_end;
+ struct dnode *dnode;
+ dnode = hpfs_map_dnode(s, dno, qbh);
+ if (!dnode) return NULL;
+ if (dn) *dn=dnode;
+ de = dnode_first_de(dnode);
+ de_end = dnode_end_de(dnode);
+ for (i = 1; de < de_end; i++, de = de_next_de(de)) {
+ if (i == n) {
+ return de;
+ }
+ if (de->last) break;
+ }
+ hpfs_brelse4(qbh);
+ hpfs_error(s, "map_nth_dirent: n too high; dnode = %08x, requested %08x", dno, n);
+ return NULL;
+}
+
+dnode_secno hpfs_de_as_down_as_possible(struct super_block *s, dnode_secno dno)
+{
+ struct quad_buffer_head qbh;
+ dnode_secno d = dno;
+ dnode_secno up = 0;
+ struct hpfs_dirent *de;
+ int c1, c2 = 0;
+
+ again:
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, d, &c1, &c2, "hpfs_de_as_down_as_possible"))
+ return d;
+ if (!(de = map_nth_dirent(s, d, 1, &qbh, NULL))) return dno;
+ if (hpfs_sb(s)->sb_chk)
+ if (up && le32_to_cpu(((struct dnode *)qbh.data)->up) != up)
+ hpfs_error(s, "hpfs_de_as_down_as_possible: bad up pointer; dnode %08x, down %08x points to %08x", up, d, le32_to_cpu(((struct dnode *)qbh.data)->up));
+ if (!de->down) {
+ hpfs_brelse4(&qbh);
+ return d;
+ }
+ up = d;
+ d = de_down_pointer(de);
+ hpfs_brelse4(&qbh);
+ goto again;
+}
+
+struct hpfs_dirent *map_pos_dirent(struct inode *inode, loff_t *posp,
+ struct quad_buffer_head *qbh)
+{
+ loff_t pos;
+ unsigned c;
+ dnode_secno dno;
+ struct hpfs_dirent *de, *d;
+ struct hpfs_dirent *up_de;
+ struct hpfs_dirent *end_up_de;
+ struct dnode *dnode;
+ struct dnode *up_dnode;
+ struct quad_buffer_head qbh0;
+
+ pos = *posp;
+ dno = pos >> 6 << 2;
+ pos &= 077;
+ if (!(de = map_nth_dirent(inode->i_sb, dno, pos, qbh, &dnode)))
+ goto bail;
+
+ /* Going to the next dirent */
+ if ((d = de_next_de(de)) < dnode_end_de(dnode)) {
+ if (!(++*posp & 077)) {
+ hpfs_error(inode->i_sb,
+ "map_pos_dirent: pos crossed dnode boundary; pos = %08llx",
+ (unsigned long long)*posp);
+ goto bail;
+ }
+ /* We're going down the tree */
+ if (d->down) {
+ *posp = ((loff_t) hpfs_de_as_down_as_possible(inode->i_sb, de_down_pointer(d)) << 4) + 1;
+ }
+
+ return de;
+ }
+
+ /* Going up */
+ if (dnode->root_dnode) goto bail;
+
+ if (!(up_dnode = hpfs_map_dnode(inode->i_sb, le32_to_cpu(dnode->up), &qbh0)))
+ goto bail;
+
+ end_up_de = dnode_end_de(up_dnode);
+ c = 0;
+ for (up_de = dnode_first_de(up_dnode); up_de < end_up_de;
+ up_de = de_next_de(up_de)) {
+ if (!(++c & 077)) hpfs_error(inode->i_sb,
+ "map_pos_dirent: pos crossed dnode boundary; dnode = %08x", le32_to_cpu(dnode->up));
+ if (up_de->down && de_down_pointer(up_de) == dno) {
+ *posp = ((loff_t) le32_to_cpu(dnode->up) << 4) + c;
+ hpfs_brelse4(&qbh0);
+ return de;
+ }
+ }
+
+ hpfs_error(inode->i_sb, "map_pos_dirent: pointer to dnode %08x not found in parent dnode %08x",
+ dno, le32_to_cpu(dnode->up));
+ hpfs_brelse4(&qbh0);
+
+ bail:
+ *posp = 12;
+ return de;
+}
+
+/* Find a dirent in tree */
+
+struct hpfs_dirent *map_dirent(struct inode *inode, dnode_secno dno,
+ const unsigned char *name, unsigned len,
+ dnode_secno *dd, struct quad_buffer_head *qbh)
+{
+ struct dnode *dnode;
+ struct hpfs_dirent *de;
+ struct hpfs_dirent *de_end;
+ int c1, c2 = 0;
+
+ if (!S_ISDIR(inode->i_mode)) hpfs_error(inode->i_sb, "map_dirent: not a directory\n");
+ again:
+ if (hpfs_sb(inode->i_sb)->sb_chk)
+ if (hpfs_stop_cycles(inode->i_sb, dno, &c1, &c2, "map_dirent")) return NULL;
+ if (!(dnode = hpfs_map_dnode(inode->i_sb, dno, qbh))) return NULL;
+
+ de_end = dnode_end_de(dnode);
+ for (de = dnode_first_de(dnode); de < de_end; de = de_next_de(de)) {
+ int t = hpfs_compare_names(inode->i_sb, name, len, de->name, de->namelen, de->last);
+ if (!t) {
+ if (dd) *dd = dno;
+ return de;
+ }
+ if (t < 0) {
+ if (de->down) {
+ dno = de_down_pointer(de);
+ hpfs_brelse4(qbh);
+ goto again;
+ }
+ break;
+ }
+ }
+ hpfs_brelse4(qbh);
+ return NULL;
+}
+
+/*
+ * Remove empty directory. In normal cases it is only one dnode with two
+ * entries, but we must handle also such obscure cases when it's a tree
+ * of empty dnodes.
+ */
+
+void hpfs_remove_dtree(struct super_block *s, dnode_secno dno)
+{
+ struct quad_buffer_head qbh;
+ struct dnode *dnode;
+ struct hpfs_dirent *de;
+ dnode_secno d1, d2, rdno = dno;
+ while (1) {
+ if (!(dnode = hpfs_map_dnode(s, dno, &qbh))) return;
+ de = dnode_first_de(dnode);
+ if (de->last) {
+ if (de->down) d1 = de_down_pointer(de);
+ else goto error;
+ hpfs_brelse4(&qbh);
+ hpfs_free_dnode(s, dno);
+ dno = d1;
+ } else break;
+ }
+ if (!de->first) goto error;
+ d1 = de->down ? de_down_pointer(de) : 0;
+ de = de_next_de(de);
+ if (!de->last) goto error;
+ d2 = de->down ? de_down_pointer(de) : 0;
+ hpfs_brelse4(&qbh);
+ hpfs_free_dnode(s, dno);
+ do {
+ while (d1) {
+ if (!(dnode = hpfs_map_dnode(s, dno = d1, &qbh))) return;
+ de = dnode_first_de(dnode);
+ if (!de->last) goto error;
+ d1 = de->down ? de_down_pointer(de) : 0;
+ hpfs_brelse4(&qbh);
+ hpfs_free_dnode(s, dno);
+ }
+ d1 = d2;
+ d2 = 0;
+ } while (d1);
+ return;
+ error:
+ hpfs_brelse4(&qbh);
+ hpfs_free_dnode(s, dno);
+ hpfs_error(s, "directory %08x is corrupted or not empty", rdno);
+}
+
+/*
+ * Find dirent for specified fnode. Use truncated 15-char name in fnode as
+ * a help for searching.
+ */
+
+struct hpfs_dirent *map_fnode_dirent(struct super_block *s, fnode_secno fno,
+ struct fnode *f, struct quad_buffer_head *qbh)
+{
+ unsigned char *name1;
+ unsigned char *name2;
+ int name1len, name2len;
+ struct dnode *d;
+ dnode_secno dno, downd;
+ struct fnode *upf;
+ struct buffer_head *bh;
+ struct hpfs_dirent *de, *de_end;
+ int c;
+ int c1, c2 = 0;
+ int d1, d2 = 0;
+ name1 = f->name;
+ if (!(name2 = kmalloc(256, GFP_NOFS))) {
+ pr_err("out of memory, can't map dirent\n");
+ return NULL;
+ }
+ if (f->len <= 15)
+ memcpy(name2, name1, name1len = name2len = f->len);
+ else {
+ memcpy(name2, name1, 15);
+ memset(name2 + 15, 0xff, 256 - 15);
+ /*name2[15] = 0xff;*/
+ name1len = 15; name2len = 256;
+ }
+ if (!(upf = hpfs_map_fnode(s, le32_to_cpu(f->up), &bh))) {
+ kfree(name2);
+ return NULL;
+ }
+ if (!fnode_is_dir(upf)) {
+ brelse(bh);
+ hpfs_error(s, "fnode %08x has non-directory parent %08x", fno, le32_to_cpu(f->up));
+ kfree(name2);
+ return NULL;
+ }
+ dno = le32_to_cpu(upf->u.external[0].disk_secno);
+ brelse(bh);
+ go_down:
+ downd = 0;
+ go_up:
+ if (!(d = hpfs_map_dnode(s, dno, qbh))) {
+ kfree(name2);
+ return NULL;
+ }
+ de_end = dnode_end_de(d);
+ de = dnode_first_de(d);
+ if (downd) {
+ while (de < de_end) {
+ if (de->down) if (de_down_pointer(de) == downd) goto f;
+ de = de_next_de(de);
+ }
+ hpfs_error(s, "pointer to dnode %08x not found in dnode %08x", downd, dno);
+ hpfs_brelse4(qbh);
+ kfree(name2);
+ return NULL;
+ }
+ next_de:
+ if (le32_to_cpu(de->fnode) == fno) {
+ kfree(name2);
+ return de;
+ }
+ c = hpfs_compare_names(s, name1, name1len, de->name, de->namelen, de->last);
+ if (c < 0 && de->down) {
+ dno = de_down_pointer(de);
+ hpfs_brelse4(qbh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, dno, &c1, &c2, "map_fnode_dirent #1")) {
+ kfree(name2);
+ return NULL;
+ }
+ goto go_down;
+ }
+ f:
+ if (le32_to_cpu(de->fnode) == fno) {
+ kfree(name2);
+ return de;
+ }
+ c = hpfs_compare_names(s, name2, name2len, de->name, de->namelen, de->last);
+ if (c < 0 && !de->last) goto not_found;
+ if ((de = de_next_de(de)) < de_end) goto next_de;
+ if (d->root_dnode) goto not_found;
+ downd = dno;
+ dno = le32_to_cpu(d->up);
+ hpfs_brelse4(qbh);
+ if (hpfs_sb(s)->sb_chk)
+ if (hpfs_stop_cycles(s, downd, &d1, &d2, "map_fnode_dirent #2")) {
+ kfree(name2);
+ return NULL;
+ }
+ goto go_up;
+ not_found:
+ hpfs_brelse4(qbh);
+ hpfs_error(s, "dirent for fnode %08x not found", fno);
+ kfree(name2);
+ return NULL;
+}
diff --git a/fs/hpfs/ea.c b/fs/hpfs/ea.c
new file mode 100644
index 000000000..102ba18e5
--- /dev/null
+++ b/fs/hpfs/ea.c
@@ -0,0 +1,368 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/ea.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * handling extended attributes
+ */
+
+#include "hpfs_fn.h"
+
+/* Remove external extended attributes. ano specifies whether a is a
+ direct sector where eas starts or an anode */
+
+void hpfs_ea_ext_remove(struct super_block *s, secno a, int ano, unsigned len)
+{
+ unsigned pos = 0;
+ while (pos < len) {
+ char ex[4 + 255 + 1 + 8];
+ struct extended_attribute *ea = (struct extended_attribute *)ex;
+ if (pos + 4 > len) {
+ hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+ ano ? "anode" : "sectors", a, len);
+ return;
+ }
+ if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return;
+ if (ea_indirect(ea)) {
+ if (ea_valuelen(ea) != 8) {
+ hpfs_error(s, "ea_indirect(ea) set while ea->valuelen!=8, %s %08x, pos %08x",
+ ano ? "anode" : "sectors", a, pos);
+ return;
+ }
+ if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 9, ex+4))
+ return;
+ hpfs_ea_remove(s, ea_sec(ea), ea_in_anode(ea), ea_len(ea));
+ }
+ pos += ea->namelen + ea_valuelen(ea) + 5;
+ }
+ if (!ano) hpfs_free_sectors(s, a, (len+511) >> 9);
+ else {
+ struct buffer_head *bh;
+ struct anode *anode;
+ if ((anode = hpfs_map_anode(s, a, &bh))) {
+ hpfs_remove_btree(s, &anode->btree);
+ brelse(bh);
+ hpfs_free_sectors(s, a, 1);
+ }
+ }
+}
+
+static char *get_indirect_ea(struct super_block *s, int ano, secno a, int size)
+{
+ char *ret;
+ if (!(ret = kmalloc(size + 1, GFP_NOFS))) {
+ pr_err("out of memory for EA\n");
+ return NULL;
+ }
+ if (hpfs_ea_read(s, a, ano, 0, size, ret)) {
+ kfree(ret);
+ return NULL;
+ }
+ ret[size] = 0;
+ return ret;
+}
+
+static void set_indirect_ea(struct super_block *s, int ano, secno a,
+ const char *data, int size)
+{
+ hpfs_ea_write(s, a, ano, 0, size, data);
+}
+
+/* Read an extended attribute named 'key' into the provided buffer */
+
+int hpfs_read_ea(struct super_block *s, struct fnode *fnode, char *key,
+ char *buf, int size)
+{
+ unsigned pos;
+ int ano, len;
+ secno a;
+ char ex[4 + 255 + 1 + 8];
+ struct extended_attribute *ea;
+ struct extended_attribute *ea_end = fnode_end_ea(fnode);
+ for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+ if (!strcmp(ea->name, key)) {
+ if (ea_indirect(ea))
+ goto indirect;
+ if (ea_valuelen(ea) >= size)
+ return -EINVAL;
+ memcpy(buf, ea_data(ea), ea_valuelen(ea));
+ buf[ea_valuelen(ea)] = 0;
+ return 0;
+ }
+ a = le32_to_cpu(fnode->ea_secno);
+ len = le32_to_cpu(fnode->ea_size_l);
+ ano = fnode_in_anode(fnode);
+ pos = 0;
+ while (pos < len) {
+ ea = (struct extended_attribute *)ex;
+ if (pos + 4 > len) {
+ hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+ ano ? "anode" : "sectors", a, len);
+ return -EIO;
+ }
+ if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return -EIO;
+ if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea_indirect(ea) ? 8 : 0), ex + 4))
+ return -EIO;
+ if (!strcmp(ea->name, key)) {
+ if (ea_indirect(ea))
+ goto indirect;
+ if (ea_valuelen(ea) >= size)
+ return -EINVAL;
+ if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea_valuelen(ea), buf))
+ return -EIO;
+ buf[ea_valuelen(ea)] = 0;
+ return 0;
+ }
+ pos += ea->namelen + ea_valuelen(ea) + 5;
+ }
+ return -ENOENT;
+indirect:
+ if (ea_len(ea) >= size)
+ return -EINVAL;
+ if (hpfs_ea_read(s, ea_sec(ea), ea_in_anode(ea), 0, ea_len(ea), buf))
+ return -EIO;
+ buf[ea_len(ea)] = 0;
+ return 0;
+}
+
+/* Read an extended attribute named 'key' */
+char *hpfs_get_ea(struct super_block *s, struct fnode *fnode, char *key, int *size)
+{
+ char *ret;
+ unsigned pos;
+ int ano, len;
+ secno a;
+ struct extended_attribute *ea;
+ struct extended_attribute *ea_end = fnode_end_ea(fnode);
+ for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+ if (!strcmp(ea->name, key)) {
+ if (ea_indirect(ea))
+ return get_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), *size = ea_len(ea));
+ if (!(ret = kmalloc((*size = ea_valuelen(ea)) + 1, GFP_NOFS))) {
+ pr_err("out of memory for EA\n");
+ return NULL;
+ }
+ memcpy(ret, ea_data(ea), ea_valuelen(ea));
+ ret[ea_valuelen(ea)] = 0;
+ return ret;
+ }
+ a = le32_to_cpu(fnode->ea_secno);
+ len = le32_to_cpu(fnode->ea_size_l);
+ ano = fnode_in_anode(fnode);
+ pos = 0;
+ while (pos < len) {
+ char ex[4 + 255 + 1 + 8];
+ ea = (struct extended_attribute *)ex;
+ if (pos + 4 > len) {
+ hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+ ano ? "anode" : "sectors", a, len);
+ return NULL;
+ }
+ if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return NULL;
+ if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea_indirect(ea) ? 8 : 0), ex + 4))
+ return NULL;
+ if (!strcmp(ea->name, key)) {
+ if (ea_indirect(ea))
+ return get_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), *size = ea_len(ea));
+ if (!(ret = kmalloc((*size = ea_valuelen(ea)) + 1, GFP_NOFS))) {
+ pr_err("out of memory for EA\n");
+ return NULL;
+ }
+ if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea_valuelen(ea), ret)) {
+ kfree(ret);
+ return NULL;
+ }
+ ret[ea_valuelen(ea)] = 0;
+ return ret;
+ }
+ pos += ea->namelen + ea_valuelen(ea) + 5;
+ }
+ return NULL;
+}
+
+/*
+ * Update or create extended attribute 'key' with value 'data'. Note that
+ * when this ea exists, it MUST have the same size as size of data.
+ * This driver can't change sizes of eas ('cause I just don't need it).
+ */
+
+void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key,
+ const char *data, int size)
+{
+ fnode_secno fno = inode->i_ino;
+ struct super_block *s = inode->i_sb;
+ unsigned pos;
+ int ano, len;
+ secno a;
+ unsigned char h[4];
+ struct extended_attribute *ea;
+ struct extended_attribute *ea_end = fnode_end_ea(fnode);
+ for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea))
+ if (!strcmp(ea->name, key)) {
+ if (ea_indirect(ea)) {
+ if (ea_len(ea) == size)
+ set_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), data, size);
+ } else if (ea_valuelen(ea) == size) {
+ memcpy(ea_data(ea), data, size);
+ }
+ return;
+ }
+ a = le32_to_cpu(fnode->ea_secno);
+ len = le32_to_cpu(fnode->ea_size_l);
+ ano = fnode_in_anode(fnode);
+ pos = 0;
+ while (pos < len) {
+ char ex[4 + 255 + 1 + 8];
+ ea = (struct extended_attribute *)ex;
+ if (pos + 4 > len) {
+ hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x",
+ ano ? "anode" : "sectors", a, len);
+ return;
+ }
+ if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return;
+ if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea_indirect(ea) ? 8 : 0), ex + 4))
+ return;
+ if (!strcmp(ea->name, key)) {
+ if (ea_indirect(ea)) {
+ if (ea_len(ea) == size)
+ set_indirect_ea(s, ea_in_anode(ea), ea_sec(ea), data, size);
+ }
+ else {
+ if (ea_valuelen(ea) == size)
+ hpfs_ea_write(s, a, ano, pos + 4 + ea->namelen + 1, size, data);
+ }
+ return;
+ }
+ pos += ea->namelen + ea_valuelen(ea) + 5;
+ }
+ if (!le16_to_cpu(fnode->ea_offs)) {
+ /*if (le16_to_cpu(fnode->ea_size_s)) {
+ hpfs_error(s, "fnode %08x: ea_size_s == %03x, ea_offs == 0",
+ inode->i_ino, le16_to_cpu(fnode->ea_size_s));
+ return;
+ }*/
+ fnode->ea_offs = cpu_to_le16(0xc4);
+ }
+ if (le16_to_cpu(fnode->ea_offs) < 0xc4 || le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) > 0x200) {
+ hpfs_error(s, "fnode %08lx: ea_offs == %03x, ea_size_s == %03x",
+ (unsigned long)inode->i_ino,
+ le16_to_cpu(fnode->ea_offs), le16_to_cpu(fnode->ea_size_s));
+ return;
+ }
+ if ((le16_to_cpu(fnode->ea_size_s) || !le32_to_cpu(fnode->ea_size_l)) &&
+ le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) + strlen(key) + size + 5 <= 0x200) {
+ ea = fnode_end_ea(fnode);
+ *(char *)ea = 0;
+ ea->namelen = strlen(key);
+ ea->valuelen_lo = size;
+ ea->valuelen_hi = size >> 8;
+ strcpy(ea->name, key);
+ memcpy(ea_data(ea), data, size);
+ fnode->ea_size_s = cpu_to_le16(le16_to_cpu(fnode->ea_size_s) + strlen(key) + size + 5);
+ goto ret;
+ }
+ /* Most the code here is 99.9993422% unused. I hope there are no bugs.
+ But what .. HPFS.IFS has also bugs in ea management. */
+ if (le16_to_cpu(fnode->ea_size_s) && !le32_to_cpu(fnode->ea_size_l)) {
+ secno n;
+ struct buffer_head *bh;
+ char *data;
+ if (!(n = hpfs_alloc_sector(s, fno, 1, 0))) return;
+ if (!(data = hpfs_get_sector(s, n, &bh))) {
+ hpfs_free_sectors(s, n, 1);
+ return;
+ }
+ memcpy(data, fnode_ea(fnode), le16_to_cpu(fnode->ea_size_s));
+ fnode->ea_size_l = cpu_to_le32(le16_to_cpu(fnode->ea_size_s));
+ fnode->ea_size_s = cpu_to_le16(0);
+ fnode->ea_secno = cpu_to_le32(n);
+ fnode->flags &= ~FNODE_anode;
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+ pos = le32_to_cpu(fnode->ea_size_l) + 5 + strlen(key) + size;
+ len = (le32_to_cpu(fnode->ea_size_l) + 511) >> 9;
+ if (pos >= 30000) goto bail;
+ while (((pos + 511) >> 9) > len) {
+ if (!len) {
+ secno q = hpfs_alloc_sector(s, fno, 1, 0);
+ if (!q) goto bail;
+ fnode->ea_secno = cpu_to_le32(q);
+ fnode->flags &= ~FNODE_anode;
+ len++;
+ } else if (!fnode_in_anode(fnode)) {
+ if (hpfs_alloc_if_possible(s, le32_to_cpu(fnode->ea_secno) + len)) {
+ len++;
+ } else {
+ /* Aargh... don't know how to create ea anodes :-( */
+ /*struct buffer_head *bh;
+ struct anode *anode;
+ anode_secno a_s;
+ if (!(anode = hpfs_alloc_anode(s, fno, &a_s, &bh)))
+ goto bail;
+ anode->up = cpu_to_le32(fno);
+ anode->btree.fnode_parent = 1;
+ anode->btree.n_free_nodes--;
+ anode->btree.n_used_nodes++;
+ anode->btree.first_free = cpu_to_le16(le16_to_cpu(anode->btree.first_free) + 12);
+ anode->u.external[0].disk_secno = cpu_to_le32(le32_to_cpu(fnode->ea_secno));
+ anode->u.external[0].file_secno = cpu_to_le32(0);
+ anode->u.external[0].length = cpu_to_le32(len);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ fnode->flags |= FNODE_anode;
+ fnode->ea_secno = cpu_to_le32(a_s);*/
+ secno new_sec;
+ int i;
+ if (!(new_sec = hpfs_alloc_sector(s, fno, 1, 1 - ((pos + 511) >> 9))))
+ goto bail;
+ for (i = 0; i < len; i++) {
+ struct buffer_head *bh1, *bh2;
+ void *b1, *b2;
+ if (!(b1 = hpfs_map_sector(s, le32_to_cpu(fnode->ea_secno) + i, &bh1, len - i - 1))) {
+ hpfs_free_sectors(s, new_sec, (pos + 511) >> 9);
+ goto bail;
+ }
+ if (!(b2 = hpfs_get_sector(s, new_sec + i, &bh2))) {
+ brelse(bh1);
+ hpfs_free_sectors(s, new_sec, (pos + 511) >> 9);
+ goto bail;
+ }
+ memcpy(b2, b1, 512);
+ brelse(bh1);
+ mark_buffer_dirty(bh2);
+ brelse(bh2);
+ }
+ hpfs_free_sectors(s, le32_to_cpu(fnode->ea_secno), len);
+ fnode->ea_secno = cpu_to_le32(new_sec);
+ len = (pos + 511) >> 9;
+ }
+ }
+ if (fnode_in_anode(fnode)) {
+ if (hpfs_add_sector_to_btree(s, le32_to_cpu(fnode->ea_secno),
+ 0, len) != -1) {
+ len++;
+ } else {
+ goto bail;
+ }
+ }
+ }
+ h[0] = 0;
+ h[1] = strlen(key);
+ h[2] = size & 0xff;
+ h[3] = size >> 8;
+ if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l), 4, h)) goto bail;
+ if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l) + 4, h[1] + 1, key)) goto bail;
+ if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode_in_anode(fnode), le32_to_cpu(fnode->ea_size_l) + 5 + h[1], size, data)) goto bail;
+ fnode->ea_size_l = cpu_to_le32(pos);
+ ret:
+ hpfs_i(inode)->i_ea_size += 5 + strlen(key) + size;
+ return;
+ bail:
+ if (le32_to_cpu(fnode->ea_secno))
+ if (fnode_in_anode(fnode)) hpfs_truncate_btree(s, le32_to_cpu(fnode->ea_secno), 1, (le32_to_cpu(fnode->ea_size_l) + 511) >> 9);
+ else hpfs_free_sectors(s, le32_to_cpu(fnode->ea_secno) + ((le32_to_cpu(fnode->ea_size_l) + 511) >> 9), len - ((le32_to_cpu(fnode->ea_size_l) + 511) >> 9));
+ else fnode->ea_secno = fnode->ea_size_l = cpu_to_le32(0);
+}
+
diff --git a/fs/hpfs/file.c b/fs/hpfs/file.c
new file mode 100644
index 000000000..077c25128
--- /dev/null
+++ b/fs/hpfs/file.c
@@ -0,0 +1,225 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/file.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * file VFS functions
+ */
+
+#include "hpfs_fn.h"
+#include <linux/mpage.h>
+#include <linux/fiemap.h>
+
+#define BLOCKS(size) (((size) + 511) >> 9)
+
+static int hpfs_file_release(struct inode *inode, struct file *file)
+{
+ hpfs_lock(inode->i_sb);
+ hpfs_write_if_changed(inode);
+ hpfs_unlock(inode->i_sb);
+ return 0;
+}
+
+int hpfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+ struct inode *inode = file->f_mapping->host;
+ int ret;
+
+ ret = file_write_and_wait_range(file, start, end);
+ if (ret)
+ return ret;
+ return sync_blockdev(inode->i_sb->s_bdev);
+}
+
+/*
+ * generic_file_read often calls bmap with non-existing sector,
+ * so we must ignore such errors.
+ */
+
+static secno hpfs_bmap(struct inode *inode, unsigned file_secno, unsigned *n_secs)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+ unsigned n, disk_secno;
+ struct fnode *fnode;
+ struct buffer_head *bh;
+ if (BLOCKS(hpfs_i(inode)->mmu_private) <= file_secno) return 0;
+ n = file_secno - hpfs_inode->i_file_sec;
+ if (n < hpfs_inode->i_n_secs) {
+ *n_secs = hpfs_inode->i_n_secs - n;
+ return hpfs_inode->i_disk_sec + n;
+ }
+ if (!(fnode = hpfs_map_fnode(inode->i_sb, inode->i_ino, &bh))) return 0;
+ disk_secno = hpfs_bplus_lookup(inode->i_sb, inode, &fnode->btree, file_secno, bh);
+ if (disk_secno == -1) return 0;
+ if (hpfs_chk_sectors(inode->i_sb, disk_secno, 1, "bmap")) return 0;
+ n = file_secno - hpfs_inode->i_file_sec;
+ if (n < hpfs_inode->i_n_secs) {
+ *n_secs = hpfs_inode->i_n_secs - n;
+ return hpfs_inode->i_disk_sec + n;
+ }
+ *n_secs = 1;
+ return disk_secno;
+}
+
+void hpfs_truncate(struct inode *i)
+{
+ if (IS_IMMUTABLE(i)) return /*-EPERM*/;
+ hpfs_lock_assert(i->i_sb);
+
+ hpfs_i(i)->i_n_secs = 0;
+ i->i_blocks = 1 + ((i->i_size + 511) >> 9);
+ hpfs_i(i)->mmu_private = i->i_size;
+ hpfs_truncate_btree(i->i_sb, i->i_ino, 1, ((i->i_size + 511) >> 9));
+ hpfs_write_inode(i);
+ hpfs_i(i)->i_n_secs = 0;
+}
+
+static int hpfs_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create)
+{
+ int r;
+ secno s;
+ unsigned n_secs;
+ hpfs_lock(inode->i_sb);
+ s = hpfs_bmap(inode, iblock, &n_secs);
+ if (s) {
+ if (bh_result->b_size >> 9 < n_secs)
+ n_secs = bh_result->b_size >> 9;
+ n_secs = hpfs_search_hotfix_map_for_range(inode->i_sb, s, n_secs);
+ if (unlikely(!n_secs)) {
+ s = hpfs_search_hotfix_map(inode->i_sb, s);
+ n_secs = 1;
+ }
+ map_bh(bh_result, inode->i_sb, s);
+ bh_result->b_size = n_secs << 9;
+ goto ret_0;
+ }
+ if (!create) goto ret_0;
+ if (iblock<<9 != hpfs_i(inode)->mmu_private) {
+ BUG();
+ r = -EIO;
+ goto ret_r;
+ }
+ if ((s = hpfs_add_sector_to_btree(inode->i_sb, inode->i_ino, 1, inode->i_blocks - 1)) == -1) {
+ hpfs_truncate_btree(inode->i_sb, inode->i_ino, 1, inode->i_blocks - 1);
+ r = -ENOSPC;
+ goto ret_r;
+ }
+ inode->i_blocks++;
+ hpfs_i(inode)->mmu_private += 512;
+ set_buffer_new(bh_result);
+ map_bh(bh_result, inode->i_sb, hpfs_search_hotfix_map(inode->i_sb, s));
+ ret_0:
+ r = 0;
+ ret_r:
+ hpfs_unlock(inode->i_sb);
+ return r;
+}
+
+static int hpfs_readpage(struct file *file, struct page *page)
+{
+ return mpage_readpage(page, hpfs_get_block);
+}
+
+static int hpfs_writepage(struct page *page, struct writeback_control *wbc)
+{
+ return block_write_full_page(page, hpfs_get_block, wbc);
+}
+
+static void hpfs_readahead(struct readahead_control *rac)
+{
+ mpage_readahead(rac, hpfs_get_block);
+}
+
+static int hpfs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ return mpage_writepages(mapping, wbc, hpfs_get_block);
+}
+
+static void hpfs_write_failed(struct address_space *mapping, loff_t to)
+{
+ struct inode *inode = mapping->host;
+
+ hpfs_lock(inode->i_sb);
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, inode->i_size);
+ hpfs_truncate(inode);
+ }
+
+ hpfs_unlock(inode->i_sb);
+}
+
+static int hpfs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ int ret;
+
+ *pagep = NULL;
+ ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
+ hpfs_get_block,
+ &hpfs_i(mapping->host)->mmu_private);
+ if (unlikely(ret))
+ hpfs_write_failed(mapping, pos + len);
+
+ return ret;
+}
+
+static int hpfs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *pagep, void *fsdata)
+{
+ struct inode *inode = mapping->host;
+ int err;
+ err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
+ if (err < len)
+ hpfs_write_failed(mapping, pos + len);
+ if (!(err < 0)) {
+ /* make sure we write it on close, if not earlier */
+ hpfs_lock(inode->i_sb);
+ hpfs_i(inode)->i_dirty = 1;
+ hpfs_unlock(inode->i_sb);
+ }
+ return err;
+}
+
+static sector_t _hpfs_bmap(struct address_space *mapping, sector_t block)
+{
+ return generic_block_bmap(mapping, block, hpfs_get_block);
+}
+
+static int hpfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, u64 start, u64 len)
+{
+ return generic_block_fiemap(inode, fieinfo, start, len, hpfs_get_block);
+}
+
+const struct address_space_operations hpfs_aops = {
+ .readpage = hpfs_readpage,
+ .writepage = hpfs_writepage,
+ .readahead = hpfs_readahead,
+ .writepages = hpfs_writepages,
+ .write_begin = hpfs_write_begin,
+ .write_end = hpfs_write_end,
+ .bmap = _hpfs_bmap
+};
+
+const struct file_operations hpfs_file_ops =
+{
+ .llseek = generic_file_llseek,
+ .read_iter = generic_file_read_iter,
+ .write_iter = generic_file_write_iter,
+ .mmap = generic_file_mmap,
+ .release = hpfs_file_release,
+ .fsync = hpfs_file_fsync,
+ .splice_read = generic_file_splice_read,
+ .unlocked_ioctl = hpfs_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
+};
+
+const struct inode_operations hpfs_file_iops =
+{
+ .setattr = hpfs_setattr,
+ .fiemap = hpfs_fiemap,
+};
diff --git a/fs/hpfs/hpfs.h b/fs/hpfs/hpfs.h
new file mode 100644
index 000000000..302f45101
--- /dev/null
+++ b/fs/hpfs/hpfs.h
@@ -0,0 +1,560 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * linux/fs/hpfs/hpfs.h
+ *
+ * HPFS structures by Chris Smith, 1993
+ *
+ * a little bit modified by Mikulas Patocka, 1998-1999
+ */
+
+/* The paper
+
+ Duncan, Roy
+ Design goals and implementation of the new High Performance File System
+ Microsoft Systems Journal Sept 1989 v4 n5 p1(13)
+
+ describes what HPFS looked like when it was new, and it is the source
+ of most of the information given here. The rest is conjecture.
+
+ For definitive information on the Duncan paper, see it, not this file.
+ For definitive information on HPFS, ask somebody else -- this is guesswork.
+ There are certain to be many mistakes. */
+
+#if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
+#error unknown endian
+#endif
+
+/* Notation */
+
+typedef u32 secno; /* sector number, partition relative */
+
+typedef secno dnode_secno; /* sector number of a dnode */
+typedef secno fnode_secno; /* sector number of an fnode */
+typedef secno anode_secno; /* sector number of an anode */
+
+typedef u32 time32_t; /* 32-bit time_t type */
+
+/* sector 0 */
+
+/* The boot block is very like a FAT boot block, except that the
+ 29h signature byte is 28h instead, and the ID string is "HPFS". */
+
+#define BB_MAGIC 0xaa55
+
+struct hpfs_boot_block
+{
+ u8 jmp[3];
+ u8 oem_id[8];
+ u8 bytes_per_sector[2]; /* 512 */
+ u8 sectors_per_cluster;
+ u8 n_reserved_sectors[2];
+ u8 n_fats;
+ u8 n_rootdir_entries[2];
+ u8 n_sectors_s[2];
+ u8 media_byte;
+ __le16 sectors_per_fat;
+ __le16 sectors_per_track;
+ __le16 heads_per_cyl;
+ __le32 n_hidden_sectors;
+ __le32 n_sectors_l; /* size of partition */
+ u8 drive_number;
+ u8 mbz;
+ u8 sig_28h; /* 28h */
+ u8 vol_serno[4];
+ u8 vol_label[11];
+ u8 sig_hpfs[8]; /* "HPFS " */
+ u8 pad[448];
+ __le16 magic; /* aa55 */
+};
+
+
+/* sector 16 */
+
+/* The super block has the pointer to the root directory. */
+
+#define SB_MAGIC 0xf995e849
+
+struct hpfs_super_block
+{
+ __le32 magic; /* f995 e849 */
+ __le32 magic1; /* fa53 e9c5, more magic? */
+ u8 version; /* version of a filesystem usually 2 */
+ u8 funcversion; /* functional version - oldest version
+ of filesystem that can understand
+ this disk */
+ __le16 zero; /* 0 */
+ __le32 root; /* fnode of root directory */
+ __le32 n_sectors; /* size of filesystem */
+ __le32 n_badblocks; /* number of bad blocks */
+ __le32 bitmaps; /* pointers to free space bit maps */
+ __le32 zero1; /* 0 */
+ __le32 badblocks; /* bad block list */
+ __le32 zero3; /* 0 */
+ __le32 last_chkdsk; /* date last checked, 0 if never */
+ __le32 last_optimize; /* date last optimized, 0 if never */
+ __le32 n_dir_band; /* number of sectors in dir band */
+ __le32 dir_band_start; /* first sector in dir band */
+ __le32 dir_band_end; /* last sector in dir band */
+ __le32 dir_band_bitmap; /* free space map, 1 dnode per bit */
+ u8 volume_name[32]; /* not used */
+ __le32 user_id_table; /* 8 preallocated sectors - user id */
+ u32 zero6[103]; /* 0 */
+};
+
+
+/* sector 17 */
+
+/* The spare block has pointers to spare sectors. */
+
+#define SP_MAGIC 0xf9911849
+
+struct hpfs_spare_block
+{
+ __le32 magic; /* f991 1849 */
+ __le32 magic1; /* fa52 29c5, more magic? */
+
+#ifdef __LITTLE_ENDIAN
+ u8 dirty: 1; /* 0 clean, 1 "improperly stopped" */
+ u8 sparedir_used: 1; /* spare dirblks used */
+ u8 hotfixes_used: 1; /* hotfixes used */
+ u8 bad_sector: 1; /* bad sector, corrupted disk (???) */
+ u8 bad_bitmap: 1; /* bad bitmap */
+ u8 fast: 1; /* partition was fast formatted */
+ u8 old_wrote: 1; /* old version wrote to partition */
+ u8 old_wrote_1: 1; /* old version wrote to partition (?) */
+#else
+ u8 old_wrote_1: 1; /* old version wrote to partition (?) */
+ u8 old_wrote: 1; /* old version wrote to partition */
+ u8 fast: 1; /* partition was fast formatted */
+ u8 bad_bitmap: 1; /* bad bitmap */
+ u8 bad_sector: 1; /* bad sector, corrupted disk (???) */
+ u8 hotfixes_used: 1; /* hotfixes used */
+ u8 sparedir_used: 1; /* spare dirblks used */
+ u8 dirty: 1; /* 0 clean, 1 "improperly stopped" */
+#endif
+
+#ifdef __LITTLE_ENDIAN
+ u8 install_dasd_limits: 1; /* HPFS386 flags */
+ u8 resynch_dasd_limits: 1;
+ u8 dasd_limits_operational: 1;
+ u8 multimedia_active: 1;
+ u8 dce_acls_active: 1;
+ u8 dasd_limits_dirty: 1;
+ u8 flag67: 2;
+#else
+ u8 flag67: 2;
+ u8 dasd_limits_dirty: 1;
+ u8 dce_acls_active: 1;
+ u8 multimedia_active: 1;
+ u8 dasd_limits_operational: 1;
+ u8 resynch_dasd_limits: 1;
+ u8 install_dasd_limits: 1; /* HPFS386 flags */
+#endif
+
+ u8 mm_contlgulty;
+ u8 unused;
+
+ __le32 hotfix_map; /* info about remapped bad sectors */
+ __le32 n_spares_used; /* number of hotfixes */
+ __le32 n_spares; /* number of spares in hotfix map */
+ __le32 n_dnode_spares_free; /* spare dnodes unused */
+ __le32 n_dnode_spares; /* length of spare_dnodes[] list,
+ follows in this block*/
+ __le32 code_page_dir; /* code page directory block */
+ __le32 n_code_pages; /* number of code pages */
+ __le32 super_crc; /* on HPFS386 and LAN Server this is
+ checksum of superblock, on normal
+ OS/2 unused */
+ __le32 spare_crc; /* on HPFS386 checksum of spareblock */
+ __le32 zero1[15]; /* unused */
+ __le32 spare_dnodes[100]; /* emergency free dnode list */
+ __le32 zero2[1]; /* room for more? */
+};
+
+/* The bad block list is 4 sectors long. The first word must be zero,
+ the remaining words give n_badblocks bad block numbers.
+ I bet you can see it coming... */
+
+#define BAD_MAGIC 0
+
+/* The hotfix map is 4 sectors long. It looks like
+
+ secno from[n_spares];
+ secno to[n_spares];
+
+ The to[] list is initialized to point to n_spares preallocated empty
+ sectors. The from[] list contains the sector numbers of bad blocks
+ which have been remapped to corresponding sectors in the to[] list.
+ n_spares_used gives the length of the from[] list. */
+
+
+/* Sectors 18 and 19 are preallocated and unused.
+ Maybe they're spares for 16 and 17, but simple substitution fails. */
+
+
+/* The code page info pointed to by the spare block consists of an index
+ block and blocks containing uppercasing tables. I don't know what
+ these are for (CHKDSK, maybe?) -- OS/2 does not seem to use them
+ itself. Linux doesn't use them either. */
+
+/* block pointed to by spareblock->code_page_dir */
+
+#define CP_DIR_MAGIC 0x494521f7
+
+struct code_page_directory
+{
+ __le32 magic; /* 4945 21f7 */
+ __le32 n_code_pages; /* number of pointers following */
+ __le32 zero1[2];
+ struct {
+ __le16 ix; /* index */
+ __le16 code_page_number; /* code page number */
+ __le32 bounds; /* matches corresponding word
+ in data block */
+ __le32 code_page_data; /* sector number of a code_page_data
+ containing c.p. array */
+ __le16 index; /* index in c.p. array in that sector*/
+ __le16 unknown; /* some unknown value; usually 0;
+ 2 in Japanese version */
+ } array[31]; /* unknown length */
+};
+
+/* blocks pointed to by code_page_directory */
+
+#define CP_DATA_MAGIC 0x894521f7
+
+struct code_page_data
+{
+ __le32 magic; /* 8945 21f7 */
+ __le32 n_used; /* # elements used in c_p_data[] */
+ __le32 bounds[3]; /* looks a bit like
+ (beg1,end1), (beg2,end2)
+ one byte each */
+ __le16 offs[3]; /* offsets from start of sector
+ to start of c_p_data[ix] */
+ struct {
+ __le16 ix; /* index */
+ __le16 code_page_number; /* code page number */
+ __le16 unknown; /* the same as in cp directory */
+ u8 map[128]; /* upcase table for chars 80..ff */
+ __le16 zero2;
+ } code_page[3];
+ u8 incognita[78];
+};
+
+
+/* Free space bitmaps are 4 sectors long, which is 16384 bits.
+ 16384 sectors is 8 meg, and each 8 meg band has a 4-sector bitmap.
+ Bit order in the maps is little-endian. 0 means taken, 1 means free.
+
+ Bit map sectors are marked allocated in the bit maps, and so are sectors
+ off the end of the partition.
+
+ Band 0 is sectors 0-3fff, its map is in sectors 18-1b.
+ Band 1 is 4000-7fff, its map is in 7ffc-7fff.
+ Band 2 is 8000-ffff, its map is in 8000-8003.
+ The remaining bands have maps in their first (even) or last (odd) 4 sectors
+ -- if the last, partial, band is odd its map is in its last 4 sectors.
+
+ The bitmap locations are given in a table pointed to by the super block.
+ No doubt they aren't constrained to be at 18, 7ffc, 8000, ...; that is
+ just where they usually are.
+
+ The "directory band" is a bunch of sectors preallocated for dnodes.
+ It has a 4-sector free space bitmap of its own. Each bit in the map
+ corresponds to one 4-sector dnode, bit 0 of the map corresponding to
+ the first 4 sectors of the directory band. The entire band is marked
+ allocated in the main bitmap. The super block gives the locations
+ of the directory band and its bitmap. ("band" doesn't mean it is
+ 8 meg long; it isn't.) */
+
+
+/* dnode: directory. 4 sectors long */
+
+/* A directory is a tree of dnodes. The fnode for a directory
+ contains one pointer, to the root dnode of the tree. The fnode
+ never moves, the dnodes do the B-tree thing, splitting and merging
+ as files are added and removed. */
+
+#define DNODE_MAGIC 0x77e40aae
+
+struct dnode {
+ __le32 magic; /* 77e4 0aae */
+ __le32 first_free; /* offset from start of dnode to
+ first free dir entry */
+#ifdef __LITTLE_ENDIAN
+ u8 root_dnode: 1; /* Is it root dnode? */
+ u8 increment_me: 7; /* some kind of activity counter? */
+ /* Neither HPFS.IFS nor CHKDSK cares
+ if you change this word */
+#else
+ u8 increment_me: 7; /* some kind of activity counter? */
+ /* Neither HPFS.IFS nor CHKDSK cares
+ if you change this word */
+ u8 root_dnode: 1; /* Is it root dnode? */
+#endif
+ u8 increment_me2[3];
+ __le32 up; /* (root dnode) directory's fnode
+ (nonroot) parent dnode */
+ __le32 self; /* pointer to this dnode */
+ u8 dirent[2028]; /* one or more dirents */
+};
+
+struct hpfs_dirent {
+ __le16 length; /* offset to next dirent */
+
+#ifdef __LITTLE_ENDIAN
+ u8 first: 1; /* set on phony ^A^A (".") entry */
+ u8 has_acl: 1;
+ u8 down: 1; /* down pointer present (after name) */
+ u8 last: 1; /* set on phony \377 entry */
+ u8 has_ea: 1; /* entry has EA */
+ u8 has_xtd_perm: 1; /* has extended perm list (???) */
+ u8 has_explicit_acl: 1;
+ u8 has_needea: 1; /* ?? some EA has NEEDEA set
+ I have no idea why this is
+ interesting in a dir entry */
+#else
+ u8 has_needea: 1; /* ?? some EA has NEEDEA set
+ I have no idea why this is
+ interesting in a dir entry */
+ u8 has_explicit_acl: 1;
+ u8 has_xtd_perm: 1; /* has extended perm list (???) */
+ u8 has_ea: 1; /* entry has EA */
+ u8 last: 1; /* set on phony \377 entry */
+ u8 down: 1; /* down pointer present (after name) */
+ u8 has_acl: 1;
+ u8 first: 1; /* set on phony ^A^A (".") entry */
+#endif
+
+#ifdef __LITTLE_ENDIAN
+ u8 read_only: 1; /* dos attrib */
+ u8 hidden: 1; /* dos attrib */
+ u8 system: 1; /* dos attrib */
+ u8 flag11: 1; /* would be volume label dos attrib */
+ u8 directory: 1; /* dos attrib */
+ u8 archive: 1; /* dos attrib */
+ u8 not_8x3: 1; /* name is not 8.3 */
+ u8 flag15: 1;
+#else
+ u8 flag15: 1;
+ u8 not_8x3: 1; /* name is not 8.3 */
+ u8 archive: 1; /* dos attrib */
+ u8 directory: 1; /* dos attrib */
+ u8 flag11: 1; /* would be volume label dos attrib */
+ u8 system: 1; /* dos attrib */
+ u8 hidden: 1; /* dos attrib */
+ u8 read_only: 1; /* dos attrib */
+#endif
+
+ __le32 fnode; /* fnode giving allocation info */
+ __le32 write_date; /* mtime */
+ __le32 file_size; /* file length, bytes */
+ __le32 read_date; /* atime */
+ __le32 creation_date; /* ctime */
+ __le32 ea_size; /* total EA length, bytes */
+ u8 no_of_acls; /* number of ACL's (low 3 bits) */
+ u8 ix; /* code page index (of filename), see
+ struct code_page_data */
+ u8 namelen, name[1]; /* file name */
+ /* dnode_secno down; btree down pointer, if present,
+ follows name on next word boundary, or maybe it
+ precedes next dirent, which is on a word boundary. */
+};
+
+
+/* B+ tree: allocation info in fnodes and anodes */
+
+/* dnodes point to fnodes which are responsible for listing the sectors
+ assigned to the file. This is done with trees of (length,address)
+ pairs. (Actually triples, of (length, file-address, disk-address)
+ which can represent holes. Find out if HPFS does that.)
+ At any rate, fnodes contain a small tree; if subtrees are needed
+ they occupy essentially a full block in anodes. A leaf-level tree node
+ has 3-word entries giving sector runs, a non-leaf node has 2-word
+ entries giving subtree pointers. A flag in the header says which. */
+
+struct bplus_leaf_node
+{
+ __le32 file_secno; /* first file sector in extent */
+ __le32 length; /* length, sectors */
+ __le32 disk_secno; /* first corresponding disk sector */
+};
+
+struct bplus_internal_node
+{
+ __le32 file_secno; /* subtree maps sectors < this */
+ __le32 down; /* pointer to subtree */
+};
+
+enum {
+ BP_hbff = 1,
+ BP_fnode_parent = 0x20,
+ BP_binary_search = 0x40,
+ BP_internal = 0x80
+};
+struct bplus_header
+{
+ u8 flags; /* bit 0 - high bit of first free entry offset
+ bit 5 - we're pointed to by an fnode,
+ the data btree or some ea or the
+ main ea bootage pointer ea_secno
+ bit 6 - suggest binary search (unused)
+ bit 7 - 1 -> (internal) tree of anodes
+ 0 -> (leaf) list of extents */
+ u8 fill[3];
+ u8 n_free_nodes; /* free nodes in following array */
+ u8 n_used_nodes; /* used nodes in following array */
+ __le16 first_free; /* offset from start of header to
+ first free node in array */
+ union {
+ struct bplus_internal_node internal[0]; /* (internal) 2-word entries giving
+ subtree pointers */
+ struct bplus_leaf_node external[0]; /* (external) 3-word entries giving
+ sector runs */
+ } u;
+};
+
+static inline bool bp_internal(struct bplus_header *bp)
+{
+ return bp->flags & BP_internal;
+}
+
+static inline bool bp_fnode_parent(struct bplus_header *bp)
+{
+ return bp->flags & BP_fnode_parent;
+}
+
+/* fnode: root of allocation b+ tree, and EA's */
+
+/* Every file and every directory has one fnode, pointed to by the directory
+ entry and pointing to the file's sectors or directory's root dnode. EA's
+ are also stored here, and there are said to be ACL's somewhere here too. */
+
+#define FNODE_MAGIC 0xf7e40aae
+
+enum {FNODE_anode = cpu_to_le16(2), FNODE_dir = cpu_to_le16(256)};
+struct fnode
+{
+ __le32 magic; /* f7e4 0aae */
+ __le32 zero1[2]; /* read history */
+ u8 len, name[15]; /* true length, truncated name */
+ __le32 up; /* pointer to file's directory fnode */
+ __le32 acl_size_l;
+ __le32 acl_secno;
+ __le16 acl_size_s;
+ u8 acl_anode;
+ u8 zero2; /* history bit count */
+ __le32 ea_size_l; /* length of disk-resident ea's */
+ __le32 ea_secno; /* first sector of disk-resident ea's*/
+ __le16 ea_size_s; /* length of fnode-resident ea's */
+
+ __le16 flags; /* bit 1 set -> ea_secno is an anode */
+ /* bit 8 set -> directory. first & only extent
+ points to dnode. */
+ struct bplus_header btree; /* b+ tree, 8 extents or 12 subtrees */
+ union {
+ struct bplus_leaf_node external[8];
+ struct bplus_internal_node internal[12];
+ } u;
+
+ __le32 file_size; /* file length, bytes */
+ __le32 n_needea; /* number of EA's with NEEDEA set */
+ u8 user_id[16]; /* unused */
+ __le16 ea_offs; /* offset from start of fnode
+ to first fnode-resident ea */
+ u8 dasd_limit_treshhold;
+ u8 dasd_limit_delta;
+ __le32 dasd_limit;
+ __le32 dasd_usage;
+ u8 ea[316]; /* zero or more EA's, packed together
+ with no alignment padding.
+ (Do not use this name, get here
+ via fnode + ea_offs. I think.) */
+};
+
+static inline bool fnode_in_anode(struct fnode *p)
+{
+ return (p->flags & FNODE_anode) != 0;
+}
+
+static inline bool fnode_is_dir(struct fnode *p)
+{
+ return (p->flags & FNODE_dir) != 0;
+}
+
+
+/* anode: 99.44% pure allocation tree */
+
+#define ANODE_MAGIC 0x37e40aae
+
+struct anode
+{
+ __le32 magic; /* 37e4 0aae */
+ __le32 self; /* pointer to this anode */
+ __le32 up; /* parent anode or fnode */
+
+ struct bplus_header btree; /* b+tree, 40 extents or 60 subtrees */
+ union {
+ struct bplus_leaf_node external[40];
+ struct bplus_internal_node internal[60];
+ } u;
+
+ __le32 fill[3]; /* unused */
+};
+
+
+/* extended attributes.
+
+ A file's EA info is stored as a list of (name,value) pairs. It is
+ usually in the fnode, but (if it's large) it is moved to a single
+ sector run outside the fnode, or to multiple runs with an anode tree
+ that points to them.
+
+ The value of a single EA is stored along with the name, or (if large)
+ it is moved to a single sector run, or multiple runs pointed to by an
+ anode tree, pointed to by the value field of the (name,value) pair.
+
+ Flags in the EA tell whether the value is immediate, in a single sector
+ run, or in multiple runs. Flags in the fnode tell whether the EA list
+ is immediate, in a single run, or in multiple runs. */
+
+enum {EA_indirect = 1, EA_anode = 2, EA_needea = 128 };
+struct extended_attribute
+{
+ u8 flags; /* bit 0 set -> value gives sector number
+ where real value starts */
+ /* bit 1 set -> sector is an anode
+ that points to fragmented value */
+ /* bit 7 set -> required ea */
+ u8 namelen; /* length of name, bytes */
+ u8 valuelen_lo; /* length of value, bytes */
+ u8 valuelen_hi; /* length of value, bytes */
+ u8 name[];
+ /*
+ u8 name[namelen]; ascii attrib name
+ u8 nul; terminating '\0', not counted
+ u8 value[valuelen]; value, arbitrary
+ if this.flags & 1, valuelen is 8 and the value is
+ u32 length; real length of value, bytes
+ secno secno; sector address where it starts
+ if this.anode, the above sector number is the root of an anode tree
+ which points to the value.
+ */
+};
+
+static inline bool ea_indirect(struct extended_attribute *ea)
+{
+ return ea->flags & EA_indirect;
+}
+
+static inline bool ea_in_anode(struct extended_attribute *ea)
+{
+ return ea->flags & EA_anode;
+}
+
+/*
+ Local Variables:
+ comment-column: 40
+ End:
+*/
diff --git a/fs/hpfs/hpfs_fn.h b/fs/hpfs/hpfs_fn.h
new file mode 100644
index 000000000..1cca83218
--- /dev/null
+++ b/fs/hpfs/hpfs_fn.h
@@ -0,0 +1,379 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * linux/fs/hpfs/hpfs_fn.h
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * function headers
+ */
+
+//#define DBG
+//#define DEBUG_LOCKS
+#ifdef pr_fmt
+#undef pr_fmt
+#endif
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/mutex.h>
+#include <linux/pagemap.h>
+#include <linux/buffer_head.h>
+#include <linux/slab.h>
+#include <linux/sched/signal.h>
+#include <linux/blkdev.h>
+#include <asm/unaligned.h>
+
+#include "hpfs.h"
+
+#define EIOERROR EIO
+#define EFSERROR EUCLEAN
+
+#define ANODE_ALLOC_FWD 512
+#define FNODE_ALLOC_FWD 0
+#define ALLOC_FWD_MIN 16
+#define ALLOC_FWD_MAX 128
+#define ALLOC_M 1
+#define FNODE_RD_AHEAD 16
+#define ANODE_RD_AHEAD 0
+#define DNODE_RD_AHEAD 72
+#define COUNT_RD_AHEAD 62
+
+#define FREE_DNODES_ADD 58
+#define FREE_DNODES_DEL 29
+
+#define CHKCOND(x,y) if (!(x)) printk y
+
+struct hpfs_inode_info {
+ loff_t mmu_private;
+ ino_t i_parent_dir; /* (directories) gives fnode of parent dir */
+ unsigned i_dno; /* (directories) root dnode */
+ unsigned i_dpos; /* (directories) temp for readdir */
+ unsigned i_dsubdno; /* (directories) temp for readdir */
+ unsigned i_file_sec; /* (files) minimalist cache of alloc info */
+ unsigned i_disk_sec; /* (files) minimalist cache of alloc info */
+ unsigned i_n_secs; /* (files) minimalist cache of alloc info */
+ unsigned i_ea_size; /* size of extended attributes */
+ unsigned i_ea_mode : 1; /* file's permission is stored in ea */
+ unsigned i_ea_uid : 1; /* file's uid is stored in ea */
+ unsigned i_ea_gid : 1; /* file's gid is stored in ea */
+ unsigned i_dirty : 1;
+ loff_t **i_rddir_off;
+ struct inode vfs_inode;
+};
+
+struct hpfs_sb_info {
+ struct mutex hpfs_mutex; /* global hpfs lock */
+ ino_t sb_root; /* inode number of root dir */
+ unsigned sb_fs_size; /* file system size, sectors */
+ unsigned sb_bitmaps; /* sector number of bitmap list */
+ unsigned sb_dirband_start; /* directory band start sector */
+ unsigned sb_dirband_size; /* directory band size, dnodes */
+ unsigned sb_dmap; /* sector number of dnode bit map */
+ unsigned sb_n_free; /* free blocks for statfs, or -1 */
+ unsigned sb_n_free_dnodes; /* free dnodes for statfs, or -1 */
+ kuid_t sb_uid; /* uid from mount options */
+ kgid_t sb_gid; /* gid from mount options */
+ umode_t sb_mode; /* mode from mount options */
+ unsigned sb_eas : 2; /* eas: 0-ignore, 1-ro, 2-rw */
+ unsigned sb_err : 2; /* on errs: 0-cont, 1-ro, 2-panic */
+ unsigned sb_chk : 2; /* checks: 0-no, 1-normal, 2-strict */
+ unsigned sb_lowercase : 1; /* downcase filenames hackery */
+ unsigned sb_was_error : 1; /* there was an error, set dirty flag */
+ unsigned sb_chkdsk : 2; /* chkdsk: 0-no, 1-on errs, 2-allways */
+ unsigned char *sb_cp_table; /* code page tables: */
+ /* 128 bytes uppercasing table & */
+ /* 128 bytes lowercasing table */
+ __le32 *sb_bmp_dir; /* main bitmap directory */
+ unsigned sb_c_bitmap; /* current bitmap */
+ unsigned sb_max_fwd_alloc; /* max forwad allocation */
+ int sb_timeshift;
+ struct rcu_head rcu;
+
+ unsigned n_hotfixes;
+ secno hotfix_from[256];
+ secno hotfix_to[256];
+};
+
+/* Four 512-byte buffers and the 2k block obtained by concatenating them */
+
+struct quad_buffer_head {
+ struct buffer_head *bh[4];
+ void *data;
+};
+
+/* The b-tree down pointer from a dir entry */
+
+static inline dnode_secno de_down_pointer (struct hpfs_dirent *de)
+{
+ CHKCOND(de->down,("HPFS: de_down_pointer: !de->down\n"));
+ return le32_to_cpu(*(__le32 *) ((void *) de + le16_to_cpu(de->length) - 4));
+}
+
+/* The first dir entry in a dnode */
+
+static inline struct hpfs_dirent *dnode_first_de (struct dnode *dnode)
+{
+ return (void *) dnode->dirent;
+}
+
+/* The end+1 of the dir entries */
+
+static inline struct hpfs_dirent *dnode_end_de (struct dnode *dnode)
+{
+ CHKCOND(le32_to_cpu(dnode->first_free)>=0x14 && le32_to_cpu(dnode->first_free)<=0xa00,("HPFS: dnode_end_de: dnode->first_free = %x\n",(unsigned)le32_to_cpu(dnode->first_free)));
+ return (void *) dnode + le32_to_cpu(dnode->first_free);
+}
+
+/* The dir entry after dir entry de */
+
+static inline struct hpfs_dirent *de_next_de (struct hpfs_dirent *de)
+{
+ CHKCOND(le16_to_cpu(de->length)>=0x20 && le16_to_cpu(de->length)<0x800,("HPFS: de_next_de: de->length = %x\n",(unsigned)le16_to_cpu(de->length)));
+ return (void *) de + le16_to_cpu(de->length);
+}
+
+static inline struct extended_attribute *fnode_ea(struct fnode *fnode)
+{
+ return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s));
+}
+
+static inline struct extended_attribute *fnode_end_ea(struct fnode *fnode)
+{
+ return (struct extended_attribute *)((char *)fnode + le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s));
+}
+
+static unsigned ea_valuelen(struct extended_attribute *ea)
+{
+ return ea->valuelen_lo + 256 * ea->valuelen_hi;
+}
+
+static inline struct extended_attribute *next_ea(struct extended_attribute *ea)
+{
+ return (struct extended_attribute *)((char *)ea + 5 + ea->namelen + ea_valuelen(ea));
+}
+
+static inline secno ea_sec(struct extended_attribute *ea)
+{
+ return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 9 + ea->namelen)));
+}
+
+static inline secno ea_len(struct extended_attribute *ea)
+{
+ return le32_to_cpu(get_unaligned((__le32 *)((char *)ea + 5 + ea->namelen)));
+}
+
+static inline char *ea_data(struct extended_attribute *ea)
+{
+ return (char *)((char *)ea + 5 + ea->namelen);
+}
+
+static inline unsigned de_size(int namelen, secno down_ptr)
+{
+ return ((0x1f + namelen + 3) & ~3) + (down_ptr ? 4 : 0);
+}
+
+static inline void copy_de(struct hpfs_dirent *dst, struct hpfs_dirent *src)
+{
+ int a;
+ int n;
+ if (!dst || !src) return;
+ a = dst->down;
+ n = dst->not_8x3;
+ memcpy((char *)dst + 2, (char *)src + 2, 28);
+ dst->down = a;
+ dst->not_8x3 = n;
+}
+
+static inline unsigned tstbits(__le32 *bmp, unsigned b, unsigned n)
+{
+ int i;
+ if ((b >= 0x4000) || (b + n - 1 >= 0x4000)) return n;
+ if (!((le32_to_cpu(bmp[(b & 0x3fff) >> 5]) >> (b & 0x1f)) & 1)) return 1;
+ for (i = 1; i < n; i++)
+ if (!((le32_to_cpu(bmp[((b+i) & 0x3fff) >> 5]) >> ((b+i) & 0x1f)) & 1))
+ return i + 1;
+ return 0;
+}
+
+/* alloc.c */
+
+int hpfs_chk_sectors(struct super_block *, secno, int, char *);
+secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int);
+int hpfs_alloc_if_possible(struct super_block *, secno);
+void hpfs_free_sectors(struct super_block *, secno, unsigned);
+int hpfs_check_free_dnodes(struct super_block *, int);
+void hpfs_free_dnode(struct super_block *, secno);
+struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *);
+struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **);
+struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **);
+int hpfs_trim_fs(struct super_block *, u64, u64, u64, unsigned *);
+
+/* anode.c */
+
+secno hpfs_bplus_lookup(struct super_block *, struct inode *, struct bplus_header *, unsigned, struct buffer_head *);
+secno hpfs_add_sector_to_btree(struct super_block *, secno, int, unsigned);
+void hpfs_remove_btree(struct super_block *, struct bplus_header *);
+int hpfs_ea_read(struct super_block *, secno, int, unsigned, unsigned, char *);
+int hpfs_ea_write(struct super_block *, secno, int, unsigned, unsigned, const char *);
+void hpfs_ea_remove(struct super_block *, secno, int, unsigned);
+void hpfs_truncate_btree(struct super_block *, secno, int, unsigned);
+void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
+
+/* buffer.c */
+
+secno hpfs_search_hotfix_map(struct super_block *s, secno sec);
+unsigned hpfs_search_hotfix_map_for_range(struct super_block *s, secno sec, unsigned n);
+void hpfs_prefetch_sectors(struct super_block *, unsigned, int);
+void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
+void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
+void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
+void *hpfs_get_4sectors(struct super_block *, unsigned, struct quad_buffer_head *);
+void hpfs_brelse4(struct quad_buffer_head *);
+void hpfs_mark_4buffers_dirty(struct quad_buffer_head *);
+
+/* dentry.c */
+
+extern const struct dentry_operations hpfs_dentry_operations;
+
+/* dir.c */
+
+struct dentry *hpfs_lookup(struct inode *, struct dentry *, unsigned int);
+extern const struct file_operations hpfs_dir_ops;
+
+/* dnode.c */
+
+int hpfs_add_pos(struct inode *, loff_t *);
+void hpfs_del_pos(struct inode *, loff_t *);
+struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *,
+ const unsigned char *, unsigned, secno);
+int hpfs_add_dirent(struct inode *, const unsigned char *, unsigned,
+ struct hpfs_dirent *);
+int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
+void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
+dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);
+struct hpfs_dirent *map_pos_dirent(struct inode *, loff_t *, struct quad_buffer_head *);
+struct hpfs_dirent *map_dirent(struct inode *, dnode_secno,
+ const unsigned char *, unsigned, dnode_secno *,
+ struct quad_buffer_head *);
+void hpfs_remove_dtree(struct super_block *, dnode_secno);
+struct hpfs_dirent *map_fnode_dirent(struct super_block *, fnode_secno, struct fnode *, struct quad_buffer_head *);
+
+/* ea.c */
+
+void hpfs_ea_ext_remove(struct super_block *, secno, int, unsigned);
+int hpfs_read_ea(struct super_block *, struct fnode *, char *, char *, int);
+char *hpfs_get_ea(struct super_block *, struct fnode *, char *, int *);
+void hpfs_set_ea(struct inode *, struct fnode *, const char *,
+ const char *, int);
+
+/* file.c */
+
+int hpfs_file_fsync(struct file *, loff_t, loff_t, int);
+void hpfs_truncate(struct inode *);
+extern const struct file_operations hpfs_file_ops;
+extern const struct inode_operations hpfs_file_iops;
+extern const struct address_space_operations hpfs_aops;
+
+/* inode.c */
+
+void hpfs_init_inode(struct inode *);
+void hpfs_read_inode(struct inode *);
+void hpfs_write_inode(struct inode *);
+void hpfs_write_inode_nolock(struct inode *);
+int hpfs_setattr(struct dentry *, struct iattr *);
+void hpfs_write_if_changed(struct inode *);
+void hpfs_evict_inode(struct inode *);
+
+/* map.c */
+
+__le32 *hpfs_map_dnode_bitmap(struct super_block *, struct quad_buffer_head *);
+__le32 *hpfs_map_bitmap(struct super_block *, unsigned, struct quad_buffer_head *, char *);
+void hpfs_prefetch_bitmap(struct super_block *, unsigned);
+unsigned char *hpfs_load_code_page(struct super_block *, secno);
+__le32 *hpfs_load_bitmap_directory(struct super_block *, secno bmp);
+void hpfs_load_hotfix_map(struct super_block *s, struct hpfs_spare_block *spareblock);
+struct fnode *hpfs_map_fnode(struct super_block *s, ino_t, struct buffer_head **);
+struct anode *hpfs_map_anode(struct super_block *s, anode_secno, struct buffer_head **);
+struct dnode *hpfs_map_dnode(struct super_block *s, dnode_secno, struct quad_buffer_head *);
+dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino);
+
+/* name.c */
+
+unsigned char hpfs_upcase(unsigned char *, unsigned char);
+int hpfs_chk_name(const unsigned char *, unsigned *);
+unsigned char *hpfs_translate_name(struct super_block *, unsigned char *, unsigned, int, int);
+int hpfs_compare_names(struct super_block *, const unsigned char *, unsigned,
+ const unsigned char *, unsigned, int);
+int hpfs_is_name_long(const unsigned char *, unsigned);
+void hpfs_adjust_length(const unsigned char *, unsigned *);
+
+/* namei.c */
+
+extern const struct inode_operations hpfs_dir_iops;
+extern const struct address_space_operations hpfs_symlink_aops;
+
+static inline struct hpfs_inode_info *hpfs_i(struct inode *inode)
+{
+ return container_of(inode, struct hpfs_inode_info, vfs_inode);
+}
+
+static inline struct hpfs_sb_info *hpfs_sb(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+/* super.c */
+
+__printf(2, 3)
+void hpfs_error(struct super_block *, const char *, ...);
+int hpfs_stop_cycles(struct super_block *, int, int *, int *, char *);
+unsigned hpfs_get_free_dnodes(struct super_block *);
+long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg);
+
+/*
+ * local time (HPFS) to GMT (Unix)
+ */
+
+static inline time64_t local_to_gmt(struct super_block *s, time64_t t)
+{
+ extern struct timezone sys_tz;
+ return t + sys_tz.tz_minuteswest * 60 + hpfs_sb(s)->sb_timeshift;
+}
+
+static inline time32_t gmt_to_local(struct super_block *s, time64_t t)
+{
+ extern struct timezone sys_tz;
+ return t - sys_tz.tz_minuteswest * 60 - hpfs_sb(s)->sb_timeshift;
+}
+
+static inline time32_t local_get_seconds(struct super_block *s)
+{
+ return gmt_to_local(s, ktime_get_real_seconds());
+}
+
+/*
+ * Locking:
+ *
+ * hpfs_lock() locks the whole filesystem. It must be taken
+ * on any method called by the VFS.
+ *
+ * We don't do any per-file locking anymore, it is hard to
+ * review and HPFS is not performance-sensitive anyway.
+ */
+static inline void hpfs_lock(struct super_block *s)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ mutex_lock(&sbi->hpfs_mutex);
+}
+
+static inline void hpfs_unlock(struct super_block *s)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ mutex_unlock(&sbi->hpfs_mutex);
+}
+
+static inline void hpfs_lock_assert(struct super_block *s)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ WARN_ON(!mutex_is_locked(&sbi->hpfs_mutex));
+}
diff --git a/fs/hpfs/inode.c b/fs/hpfs/inode.c
new file mode 100644
index 000000000..eb8b4baf0
--- /dev/null
+++ b/fs/hpfs/inode.c
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/inode.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * inode VFS functions
+ */
+
+#include <linux/slab.h>
+#include <linux/user_namespace.h>
+#include "hpfs_fn.h"
+
+void hpfs_init_inode(struct inode *i)
+{
+ struct super_block *sb = i->i_sb;
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+
+ i->i_uid = hpfs_sb(sb)->sb_uid;
+ i->i_gid = hpfs_sb(sb)->sb_gid;
+ i->i_mode = hpfs_sb(sb)->sb_mode;
+ i->i_size = -1;
+ i->i_blocks = -1;
+
+ hpfs_inode->i_dno = 0;
+ hpfs_inode->i_n_secs = 0;
+ hpfs_inode->i_file_sec = 0;
+ hpfs_inode->i_disk_sec = 0;
+ hpfs_inode->i_dpos = 0;
+ hpfs_inode->i_dsubdno = 0;
+ hpfs_inode->i_ea_mode = 0;
+ hpfs_inode->i_ea_uid = 0;
+ hpfs_inode->i_ea_gid = 0;
+ hpfs_inode->i_ea_size = 0;
+
+ hpfs_inode->i_rddir_off = NULL;
+ hpfs_inode->i_dirty = 0;
+
+ i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0;
+ i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0;
+ i->i_atime.tv_sec = i->i_atime.tv_nsec = 0;
+}
+
+void hpfs_read_inode(struct inode *i)
+{
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ struct super_block *sb = i->i_sb;
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ void *ea;
+ int ea_size;
+
+ if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) {
+ /*i->i_mode |= S_IFREG;
+ i->i_mode &= ~0111;
+ i->i_op = &hpfs_file_iops;
+ i->i_fop = &hpfs_file_ops;
+ clear_nlink(i);*/
+ make_bad_inode(i);
+ return;
+ }
+ if (hpfs_sb(i->i_sb)->sb_eas) {
+ if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) {
+ if (ea_size == 2) {
+ i_uid_write(i, le16_to_cpu(*(__le16*)ea));
+ hpfs_inode->i_ea_uid = 1;
+ }
+ kfree(ea);
+ }
+ if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) {
+ if (ea_size == 2) {
+ i_gid_write(i, le16_to_cpu(*(__le16*)ea));
+ hpfs_inode->i_ea_gid = 1;
+ }
+ kfree(ea);
+ }
+ if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) {
+ kfree(ea);
+ i->i_mode = S_IFLNK | 0777;
+ i->i_op = &page_symlink_inode_operations;
+ inode_nohighmem(i);
+ i->i_data.a_ops = &hpfs_symlink_aops;
+ set_nlink(i, 1);
+ i->i_size = ea_size;
+ i->i_blocks = 1;
+ brelse(bh);
+ return;
+ }
+ if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) {
+ int rdev = 0;
+ umode_t mode = hpfs_sb(sb)->sb_mode;
+ if (ea_size == 2) {
+ mode = le16_to_cpu(*(__le16*)ea);
+ hpfs_inode->i_ea_mode = 1;
+ }
+ kfree(ea);
+ i->i_mode = mode;
+ if (S_ISBLK(mode) || S_ISCHR(mode)) {
+ if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) {
+ if (ea_size == 4)
+ rdev = le32_to_cpu(*(__le32*)ea);
+ kfree(ea);
+ }
+ }
+ if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) {
+ brelse(bh);
+ set_nlink(i, 1);
+ i->i_size = 0;
+ i->i_blocks = 1;
+ init_special_inode(i, mode,
+ new_decode_dev(rdev));
+ return;
+ }
+ }
+ }
+ if (fnode_is_dir(fnode)) {
+ int n_dnodes, n_subdirs;
+ i->i_mode |= S_IFDIR;
+ i->i_op = &hpfs_dir_iops;
+ i->i_fop = &hpfs_dir_ops;
+ hpfs_inode->i_parent_dir = le32_to_cpu(fnode->up);
+ hpfs_inode->i_dno = le32_to_cpu(fnode->u.external[0].disk_secno);
+ if (hpfs_sb(sb)->sb_chk >= 2) {
+ struct buffer_head *bh0;
+ if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0);
+ }
+ n_dnodes = 0; n_subdirs = 0;
+ hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL);
+ i->i_blocks = 4 * n_dnodes;
+ i->i_size = 2048 * n_dnodes;
+ set_nlink(i, 2 + n_subdirs);
+ } else {
+ i->i_mode |= S_IFREG;
+ if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111;
+ i->i_op = &hpfs_file_iops;
+ i->i_fop = &hpfs_file_ops;
+ set_nlink(i, 1);
+ i->i_size = le32_to_cpu(fnode->file_size);
+ i->i_blocks = ((i->i_size + 511) >> 9) + 1;
+ i->i_data.a_ops = &hpfs_aops;
+ hpfs_i(i)->mmu_private = i->i_size;
+ }
+ brelse(bh);
+}
+
+static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ /*if (le32_to_cpu(fnode->acl_size_l) || le16_to_cpu(fnode->acl_size_s)) {
+ Some unknown structures like ACL may be in fnode,
+ we'd better not overwrite them
+ hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 structures", i->i_ino);
+ } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) {
+ __le32 ea;
+ if (!uid_eq(i->i_uid, hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) {
+ ea = cpu_to_le32(i_uid_read(i));
+ hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2);
+ hpfs_inode->i_ea_uid = 1;
+ }
+ if (!gid_eq(i->i_gid, hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) {
+ ea = cpu_to_le32(i_gid_read(i));
+ hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2);
+ hpfs_inode->i_ea_gid = 1;
+ }
+ if (!S_ISLNK(i->i_mode))
+ if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111))
+ | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))
+ && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333))
+ | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) {
+ ea = cpu_to_le32(i->i_mode);
+ /* sick, but legal */
+ hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2);
+ hpfs_inode->i_ea_mode = 1;
+ }
+ if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) {
+ ea = cpu_to_le32(new_encode_dev(i->i_rdev));
+ hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4);
+ }
+ }
+}
+
+void hpfs_write_inode(struct inode *i)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ struct inode *parent;
+ if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
+ if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) {
+ if (*hpfs_inode->i_rddir_off)
+ pr_err("write_inode: some position still there\n");
+ kfree(hpfs_inode->i_rddir_off);
+ hpfs_inode->i_rddir_off = NULL;
+ }
+ if (!i->i_nlink) {
+ return;
+ }
+ parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir);
+ if (parent) {
+ hpfs_inode->i_dirty = 0;
+ if (parent->i_state & I_NEW) {
+ hpfs_init_inode(parent);
+ hpfs_read_inode(parent);
+ unlock_new_inode(parent);
+ }
+ hpfs_write_inode_nolock(i);
+ iput(parent);
+ }
+}
+
+void hpfs_write_inode_nolock(struct inode *i)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de;
+ if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
+ if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
+ if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) {
+ if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
+ brelse(bh);
+ return;
+ }
+ } else de = NULL;
+ if (S_ISREG(i->i_mode)) {
+ fnode->file_size = cpu_to_le32(i->i_size);
+ if (de) de->file_size = cpu_to_le32(i->i_size);
+ } else if (S_ISDIR(i->i_mode)) {
+ fnode->file_size = cpu_to_le32(0);
+ if (de) de->file_size = cpu_to_le32(0);
+ }
+ hpfs_write_inode_ea(i, fnode);
+ if (de) {
+ de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
+ de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
+ de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
+ de->read_only = !(i->i_mode & 0222);
+ de->ea_size = cpu_to_le32(hpfs_inode->i_ea_size);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ }
+ if (S_ISDIR(i->i_mode)) {
+ if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) {
+ de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
+ de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
+ de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
+ de->read_only = !(i->i_mode & 0222);
+ de->ea_size = cpu_to_le32(/*hpfs_inode->i_ea_size*/0);
+ de->file_size = cpu_to_le32(0);
+ hpfs_mark_4buffers_dirty(&qbh);
+ hpfs_brelse4(&qbh);
+ } else
+ hpfs_error(i->i_sb,
+ "directory %08lx doesn't have '.' entry",
+ (unsigned long)i->i_ino);
+ }
+ mark_buffer_dirty(bh);
+ brelse(bh);
+}
+
+int hpfs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+ struct inode *inode = d_inode(dentry);
+ int error = -EINVAL;
+
+ hpfs_lock(inode->i_sb);
+ if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root)
+ goto out_unlock;
+ if ((attr->ia_valid & ATTR_UID) &&
+ from_kuid(&init_user_ns, attr->ia_uid) >= 0x10000)
+ goto out_unlock;
+ if ((attr->ia_valid & ATTR_GID) &&
+ from_kgid(&init_user_ns, attr->ia_gid) >= 0x10000)
+ goto out_unlock;
+ if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size)
+ goto out_unlock;
+
+ error = setattr_prepare(dentry, attr);
+ if (error)
+ goto out_unlock;
+
+ if ((attr->ia_valid & ATTR_SIZE) &&
+ attr->ia_size != i_size_read(inode)) {
+ error = inode_newsize_ok(inode, attr->ia_size);
+ if (error)
+ goto out_unlock;
+
+ truncate_setsize(inode, attr->ia_size);
+ hpfs_truncate(inode);
+ }
+
+ setattr_copy(inode, attr);
+
+ hpfs_write_inode(inode);
+
+ out_unlock:
+ hpfs_unlock(inode->i_sb);
+ return error;
+}
+
+void hpfs_write_if_changed(struct inode *inode)
+{
+ struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
+
+ if (hpfs_inode->i_dirty)
+ hpfs_write_inode(inode);
+}
+
+void hpfs_evict_inode(struct inode *inode)
+{
+ truncate_inode_pages_final(&inode->i_data);
+ clear_inode(inode);
+ if (!inode->i_nlink) {
+ hpfs_lock(inode->i_sb);
+ hpfs_remove_fnode(inode->i_sb, inode->i_ino);
+ hpfs_unlock(inode->i_sb);
+ }
+}
diff --git a/fs/hpfs/map.c b/fs/hpfs/map.c
new file mode 100644
index 000000000..ecd9fccd1
--- /dev/null
+++ b/fs/hpfs/map.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/map.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * mapping structures to memory with some minimal checks
+ */
+
+#include "hpfs_fn.h"
+
+__le32 *hpfs_map_dnode_bitmap(struct super_block *s, struct quad_buffer_head *qbh)
+{
+ return hpfs_map_4sectors(s, hpfs_sb(s)->sb_dmap, qbh, 0);
+}
+
+__le32 *hpfs_map_bitmap(struct super_block *s, unsigned bmp_block,
+ struct quad_buffer_head *qbh, char *id)
+{
+ secno sec;
+ __le32 *ret;
+ unsigned n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
+ if (hpfs_sb(s)->sb_chk) if (bmp_block >= n_bands) {
+ hpfs_error(s, "hpfs_map_bitmap called with bad parameter: %08x at %s", bmp_block, id);
+ return NULL;
+ }
+ sec = le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[bmp_block]);
+ if (!sec || sec > hpfs_sb(s)->sb_fs_size-4) {
+ hpfs_error(s, "invalid bitmap block pointer %08x -> %08x at %s", bmp_block, sec, id);
+ return NULL;
+ }
+ ret = hpfs_map_4sectors(s, sec, qbh, 4);
+ if (ret) hpfs_prefetch_bitmap(s, bmp_block + 1);
+ return ret;
+}
+
+void hpfs_prefetch_bitmap(struct super_block *s, unsigned bmp_block)
+{
+ unsigned to_prefetch, next_prefetch;
+ unsigned n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
+ if (unlikely(bmp_block >= n_bands))
+ return;
+ to_prefetch = le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[bmp_block]);
+ if (unlikely(bmp_block + 1 >= n_bands))
+ next_prefetch = 0;
+ else
+ next_prefetch = le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[bmp_block + 1]);
+ hpfs_prefetch_sectors(s, to_prefetch, 4 + 4 * (to_prefetch + 4 == next_prefetch));
+}
+
+/*
+ * Load first code page into kernel memory, return pointer to 256-byte array,
+ * first 128 bytes are uppercasing table for chars 128-255, next 128 bytes are
+ * lowercasing table
+ */
+
+unsigned char *hpfs_load_code_page(struct super_block *s, secno cps)
+{
+ struct buffer_head *bh;
+ secno cpds;
+ unsigned cpi;
+ unsigned char *ptr;
+ unsigned char *cp_table;
+ int i;
+ struct code_page_data *cpd;
+ struct code_page_directory *cp = hpfs_map_sector(s, cps, &bh, 0);
+ if (!cp) return NULL;
+ if (le32_to_cpu(cp->magic) != CP_DIR_MAGIC) {
+ pr_err("Code page directory magic doesn't match (magic = %08x)\n",
+ le32_to_cpu(cp->magic));
+ brelse(bh);
+ return NULL;
+ }
+ if (!le32_to_cpu(cp->n_code_pages)) {
+ pr_err("n_code_pages == 0\n");
+ brelse(bh);
+ return NULL;
+ }
+ cpds = le32_to_cpu(cp->array[0].code_page_data);
+ cpi = le16_to_cpu(cp->array[0].index);
+ brelse(bh);
+
+ if (cpi >= 3) {
+ pr_err("Code page index out of array\n");
+ return NULL;
+ }
+
+ if (!(cpd = hpfs_map_sector(s, cpds, &bh, 0))) return NULL;
+ if (le16_to_cpu(cpd->offs[cpi]) > 0x178) {
+ pr_err("Code page index out of sector\n");
+ brelse(bh);
+ return NULL;
+ }
+ ptr = (unsigned char *)cpd + le16_to_cpu(cpd->offs[cpi]) + 6;
+ if (!(cp_table = kmalloc(256, GFP_KERNEL))) {
+ pr_err("out of memory for code page table\n");
+ brelse(bh);
+ return NULL;
+ }
+ memcpy(cp_table, ptr, 128);
+ brelse(bh);
+
+ /* Try to build lowercasing table from uppercasing one */
+
+ for (i=128; i<256; i++) cp_table[i]=i;
+ for (i=128; i<256; i++) if (cp_table[i-128]!=i && cp_table[i-128]>=128)
+ cp_table[cp_table[i-128]] = i;
+
+ return cp_table;
+}
+
+__le32 *hpfs_load_bitmap_directory(struct super_block *s, secno bmp)
+{
+ struct buffer_head *bh;
+ int n = (hpfs_sb(s)->sb_fs_size + 0x200000 - 1) >> 21;
+ int i;
+ __le32 *b;
+ if (!(b = kmalloc_array(n, 512, GFP_KERNEL))) {
+ pr_err("can't allocate memory for bitmap directory\n");
+ return NULL;
+ }
+ for (i=0;i<n;i++) {
+ __le32 *d = hpfs_map_sector(s, bmp+i, &bh, n - i - 1);
+ if (!d) {
+ kfree(b);
+ return NULL;
+ }
+ memcpy((char *)b + 512 * i, d, 512);
+ brelse(bh);
+ }
+ return b;
+}
+
+void hpfs_load_hotfix_map(struct super_block *s, struct hpfs_spare_block *spareblock)
+{
+ struct quad_buffer_head qbh;
+ __le32 *directory;
+ u32 n_hotfixes, n_used_hotfixes;
+ unsigned i;
+
+ n_hotfixes = le32_to_cpu(spareblock->n_spares);
+ n_used_hotfixes = le32_to_cpu(spareblock->n_spares_used);
+
+ if (n_hotfixes > 256 || n_used_hotfixes > n_hotfixes) {
+ hpfs_error(s, "invalid number of hotfixes: %u, used: %u", n_hotfixes, n_used_hotfixes);
+ return;
+ }
+ if (!(directory = hpfs_map_4sectors(s, le32_to_cpu(spareblock->hotfix_map), &qbh, 0))) {
+ hpfs_error(s, "can't load hotfix map");
+ return;
+ }
+ for (i = 0; i < n_used_hotfixes; i++) {
+ hpfs_sb(s)->hotfix_from[i] = le32_to_cpu(directory[i]);
+ hpfs_sb(s)->hotfix_to[i] = le32_to_cpu(directory[n_hotfixes + i]);
+ }
+ hpfs_sb(s)->n_hotfixes = n_used_hotfixes;
+ hpfs_brelse4(&qbh);
+}
+
+/*
+ * Load fnode to memory
+ */
+
+struct fnode *hpfs_map_fnode(struct super_block *s, ino_t ino, struct buffer_head **bhp)
+{
+ struct fnode *fnode;
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, ino, 1, "fnode")) {
+ return NULL;
+ }
+ if ((fnode = hpfs_map_sector(s, ino, bhp, FNODE_RD_AHEAD))) {
+ if (hpfs_sb(s)->sb_chk) {
+ struct extended_attribute *ea;
+ struct extended_attribute *ea_end;
+ if (le32_to_cpu(fnode->magic) != FNODE_MAGIC) {
+ hpfs_error(s, "bad magic on fnode %08lx",
+ (unsigned long)ino);
+ goto bail;
+ }
+ if (!fnode_is_dir(fnode)) {
+ if ((unsigned)fnode->btree.n_used_nodes + (unsigned)fnode->btree.n_free_nodes !=
+ (bp_internal(&fnode->btree) ? 12 : 8)) {
+ hpfs_error(s,
+ "bad number of nodes in fnode %08lx",
+ (unsigned long)ino);
+ goto bail;
+ }
+ if (le16_to_cpu(fnode->btree.first_free) !=
+ 8 + fnode->btree.n_used_nodes * (bp_internal(&fnode->btree) ? 8 : 12)) {
+ hpfs_error(s,
+ "bad first_free pointer in fnode %08lx",
+ (unsigned long)ino);
+ goto bail;
+ }
+ }
+ if (le16_to_cpu(fnode->ea_size_s) && (le16_to_cpu(fnode->ea_offs) < 0xc4 ||
+ le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) > 0x200)) {
+ hpfs_error(s,
+ "bad EA info in fnode %08lx: ea_offs == %04x ea_size_s == %04x",
+ (unsigned long)ino,
+ le16_to_cpu(fnode->ea_offs), le16_to_cpu(fnode->ea_size_s));
+ goto bail;
+ }
+ ea = fnode_ea(fnode);
+ ea_end = fnode_end_ea(fnode);
+ while (ea != ea_end) {
+ if (ea > ea_end) {
+ hpfs_error(s, "bad EA in fnode %08lx",
+ (unsigned long)ino);
+ goto bail;
+ }
+ ea = next_ea(ea);
+ }
+ }
+ }
+ return fnode;
+ bail:
+ brelse(*bhp);
+ return NULL;
+}
+
+struct anode *hpfs_map_anode(struct super_block *s, anode_secno ano, struct buffer_head **bhp)
+{
+ struct anode *anode;
+ if (hpfs_sb(s)->sb_chk) if (hpfs_chk_sectors(s, ano, 1, "anode")) return NULL;
+ if ((anode = hpfs_map_sector(s, ano, bhp, ANODE_RD_AHEAD)))
+ if (hpfs_sb(s)->sb_chk) {
+ if (le32_to_cpu(anode->magic) != ANODE_MAGIC) {
+ hpfs_error(s, "bad magic on anode %08x", ano);
+ goto bail;
+ }
+ if (le32_to_cpu(anode->self) != ano) {
+ hpfs_error(s, "self pointer invalid on anode %08x", ano);
+ goto bail;
+ }
+ if ((unsigned)anode->btree.n_used_nodes + (unsigned)anode->btree.n_free_nodes !=
+ (bp_internal(&anode->btree) ? 60 : 40)) {
+ hpfs_error(s, "bad number of nodes in anode %08x", ano);
+ goto bail;
+ }
+ if (le16_to_cpu(anode->btree.first_free) !=
+ 8 + anode->btree.n_used_nodes * (bp_internal(&anode->btree) ? 8 : 12)) {
+ hpfs_error(s, "bad first_free pointer in anode %08x", ano);
+ goto bail;
+ }
+ }
+ return anode;
+ bail:
+ brelse(*bhp);
+ return NULL;
+}
+
+/*
+ * Load dnode to memory and do some checks
+ */
+
+struct dnode *hpfs_map_dnode(struct super_block *s, unsigned secno,
+ struct quad_buffer_head *qbh)
+{
+ struct dnode *dnode;
+ if (hpfs_sb(s)->sb_chk) {
+ if (hpfs_chk_sectors(s, secno, 4, "dnode")) return NULL;
+ if (secno & 3) {
+ hpfs_error(s, "dnode %08x not byte-aligned", secno);
+ return NULL;
+ }
+ }
+ if ((dnode = hpfs_map_4sectors(s, secno, qbh, DNODE_RD_AHEAD)))
+ if (hpfs_sb(s)->sb_chk) {
+ unsigned p, pp = 0;
+ unsigned char *d = (unsigned char *)dnode;
+ int b = 0;
+ if (le32_to_cpu(dnode->magic) != DNODE_MAGIC) {
+ hpfs_error(s, "bad magic on dnode %08x", secno);
+ goto bail;
+ }
+ if (le32_to_cpu(dnode->self) != secno)
+ hpfs_error(s, "bad self pointer on dnode %08x self = %08x", secno, le32_to_cpu(dnode->self));
+ /* Check dirents - bad dirents would cause infinite
+ loops or shooting to memory */
+ if (le32_to_cpu(dnode->first_free) > 2048) {
+ hpfs_error(s, "dnode %08x has first_free == %08x", secno, le32_to_cpu(dnode->first_free));
+ goto bail;
+ }
+ for (p = 20; p < le32_to_cpu(dnode->first_free); p += d[p] + (d[p+1] << 8)) {
+ struct hpfs_dirent *de = (struct hpfs_dirent *)((char *)dnode + p);
+ if (le16_to_cpu(de->length) > 292 || (le16_to_cpu(de->length) < 32) || (le16_to_cpu(de->length) & 3) || p + le16_to_cpu(de->length) > 2048) {
+ hpfs_error(s, "bad dirent size in dnode %08x, dirent %03x, last %03x", secno, p, pp);
+ goto bail;
+ }
+ if (((31 + de->namelen + de->down*4 + 3) & ~3) != le16_to_cpu(de->length)) {
+ if (((31 + de->namelen + de->down*4 + 3) & ~3) < le16_to_cpu(de->length) && s->s_flags & SB_RDONLY) goto ok;
+ hpfs_error(s, "namelen does not match dirent size in dnode %08x, dirent %03x, last %03x", secno, p, pp);
+ goto bail;
+ }
+ ok:
+ if (hpfs_sb(s)->sb_chk >= 2) b |= 1 << de->down;
+ if (de->down) if (de_down_pointer(de) < 0x10) {
+ hpfs_error(s, "bad down pointer in dnode %08x, dirent %03x, last %03x", secno, p, pp);
+ goto bail;
+ }
+ pp = p;
+
+ }
+ if (p != le32_to_cpu(dnode->first_free)) {
+ hpfs_error(s, "size on last dirent does not match first_free; dnode %08x", secno);
+ goto bail;
+ }
+ if (d[pp + 30] != 1 || d[pp + 31] != 255) {
+ hpfs_error(s, "dnode %08x does not end with \\377 entry", secno);
+ goto bail;
+ }
+ if (b == 3)
+ pr_err("unbalanced dnode tree, dnode %08x; see hpfs.txt 4 more info\n",
+ secno);
+ }
+ return dnode;
+ bail:
+ hpfs_brelse4(qbh);
+ return NULL;
+}
+
+dnode_secno hpfs_fnode_dno(struct super_block *s, ino_t ino)
+{
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ dnode_secno dno;
+
+ fnode = hpfs_map_fnode(s, ino, &bh);
+ if (!fnode)
+ return 0;
+
+ dno = le32_to_cpu(fnode->u.external[0].disk_secno);
+ brelse(bh);
+ return dno;
+}
diff --git a/fs/hpfs/name.c b/fs/hpfs/name.c
new file mode 100644
index 000000000..ef7ba77f3
--- /dev/null
+++ b/fs/hpfs/name.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/name.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * operations with filenames
+ */
+
+#include "hpfs_fn.h"
+
+static inline int not_allowed_char(unsigned char c)
+{
+ return c<' ' || c=='"' || c=='*' || c=='/' || c==':' || c=='<' ||
+ c=='>' || c=='?' || c=='\\' || c=='|';
+}
+
+static inline int no_dos_char(unsigned char c)
+{ /* Characters that are allowed in HPFS but not in DOS */
+ return c=='+' || c==',' || c==';' || c=='=' || c=='[' || c==']';
+}
+
+static inline unsigned char upcase(unsigned char *dir, unsigned char a)
+{
+ if (a<128 || a==255) return a>='a' && a<='z' ? a - 0x20 : a;
+ if (!dir) return a;
+ return dir[a-128];
+}
+
+unsigned char hpfs_upcase(unsigned char *dir, unsigned char a)
+{
+ return upcase(dir, a);
+}
+
+static inline unsigned char locase(unsigned char *dir, unsigned char a)
+{
+ if (a<128 || a==255) return a>='A' && a<='Z' ? a + 0x20 : a;
+ if (!dir) return a;
+ return dir[a];
+}
+
+int hpfs_chk_name(const unsigned char *name, unsigned *len)
+{
+ int i;
+ if (*len > 254) return -ENAMETOOLONG;
+ hpfs_adjust_length(name, len);
+ if (!*len) return -EINVAL;
+ for (i = 0; i < *len; i++) if (not_allowed_char(name[i])) return -EINVAL;
+ if (*len == 1) if (name[0] == '.') return -EINVAL;
+ if (*len == 2) if (name[0] == '.' && name[1] == '.') return -EINVAL;
+ return 0;
+}
+
+unsigned char *hpfs_translate_name(struct super_block *s, unsigned char *from,
+ unsigned len, int lc, int lng)
+{
+ unsigned char *to;
+ int i;
+ if (hpfs_sb(s)->sb_chk >= 2) if (hpfs_is_name_long(from, len) != lng) {
+ pr_err("Long name flag mismatch - name ");
+ for (i = 0; i < len; i++)
+ pr_cont("%c", from[i]);
+ pr_cont(" misidentified as %s.\n", lng ? "short" : "long");
+ pr_err("It's nothing serious. It could happen because of bug in OS/2.\nSet checks=normal to disable this message.\n");
+ }
+ if (!lc) return from;
+ if (!(to = kmalloc(len, GFP_KERNEL))) {
+ pr_err("can't allocate memory for name conversion buffer\n");
+ return from;
+ }
+ for (i = 0; i < len; i++) to[i] = locase(hpfs_sb(s)->sb_cp_table,from[i]);
+ return to;
+}
+
+int hpfs_compare_names(struct super_block *s,
+ const unsigned char *n1, unsigned l1,
+ const unsigned char *n2, unsigned l2, int last)
+{
+ unsigned l = l1 < l2 ? l1 : l2;
+ unsigned i;
+ if (last) return -1;
+ for (i = 0; i < l; i++) {
+ unsigned char c1 = upcase(hpfs_sb(s)->sb_cp_table,n1[i]);
+ unsigned char c2 = upcase(hpfs_sb(s)->sb_cp_table,n2[i]);
+ if (c1 < c2) return -1;
+ if (c1 > c2) return 1;
+ }
+ if (l1 < l2) return -1;
+ if (l1 > l2) return 1;
+ return 0;
+}
+
+int hpfs_is_name_long(const unsigned char *name, unsigned len)
+{
+ int i,j;
+ for (i = 0; i < len && name[i] != '.'; i++)
+ if (no_dos_char(name[i])) return 1;
+ if (!i || i > 8) return 1;
+ if (i == len) return 0;
+ for (j = i + 1; j < len; j++)
+ if (name[j] == '.' || no_dos_char(name[i])) return 1;
+ return j - i > 4;
+}
+
+/* OS/2 clears dots and spaces at the end of file name, so we have to */
+
+void hpfs_adjust_length(const unsigned char *name, unsigned *len)
+{
+ if (!*len) return;
+ if (*len == 1 && name[0] == '.') return;
+ if (*len == 2 && name[0] == '.' && name[1] == '.') return;
+ while (*len && (name[*len - 1] == '.' || name[*len - 1] == ' '))
+ (*len)--;
+}
diff --git a/fs/hpfs/namei.c b/fs/hpfs/namei.c
new file mode 100644
index 000000000..1aee39160
--- /dev/null
+++ b/fs/hpfs/namei.c
@@ -0,0 +1,628 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * linux/fs/hpfs/namei.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * adding & removing files & directories
+ */
+#include <linux/sched.h>
+#include "hpfs_fn.h"
+
+static void hpfs_update_directory_times(struct inode *dir)
+{
+ time64_t t = local_to_gmt(dir->i_sb, local_get_seconds(dir->i_sb));
+ if (t == dir->i_mtime.tv_sec &&
+ t == dir->i_ctime.tv_sec)
+ return;
+ dir->i_mtime.tv_sec = dir->i_ctime.tv_sec = t;
+ dir->i_mtime.tv_nsec = dir->i_ctime.tv_nsec = 0;
+ hpfs_write_inode_nolock(dir);
+}
+
+static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct quad_buffer_head qbh0;
+ struct buffer_head *bh;
+ struct hpfs_dirent *de;
+ struct fnode *fnode;
+ struct dnode *dnode;
+ struct inode *result;
+ fnode_secno fno;
+ dnode_secno dno;
+ int r;
+ struct hpfs_dirent dee;
+ int err;
+ if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
+ hpfs_lock(dir->i_sb);
+ err = -ENOSPC;
+ fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
+ if (!fnode)
+ goto bail;
+ dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
+ if (!dnode)
+ goto bail1;
+ memset(&dee, 0, sizeof dee);
+ dee.directory = 1;
+ if (!(mode & 0222)) dee.read_only = 1;
+ /*dee.archive = 0;*/
+ dee.hidden = name[0] == '.';
+ dee.fnode = cpu_to_le32(fno);
+ dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(local_get_seconds(dir->i_sb));
+ result = new_inode(dir->i_sb);
+ if (!result)
+ goto bail2;
+ hpfs_init_inode(result);
+ result->i_ino = fno;
+ hpfs_i(result)->i_parent_dir = dir->i_ino;
+ hpfs_i(result)->i_dno = dno;
+ result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
+ result->i_ctime.tv_nsec = 0;
+ result->i_mtime.tv_nsec = 0;
+ result->i_atime.tv_nsec = 0;
+ hpfs_i(result)->i_ea_size = 0;
+ result->i_mode |= S_IFDIR;
+ result->i_op = &hpfs_dir_iops;
+ result->i_fop = &hpfs_dir_ops;
+ result->i_blocks = 4;
+ result->i_size = 2048;
+ set_nlink(result, 2);
+ if (dee.read_only)
+ result->i_mode &= ~0222;
+
+ r = hpfs_add_dirent(dir, name, len, &dee);
+ if (r == 1)
+ goto bail3;
+ if (r == -1) {
+ err = -EEXIST;
+ goto bail3;
+ }
+ fnode->len = len;
+ memcpy(fnode->name, name, len > 15 ? 15 : len);
+ fnode->up = cpu_to_le32(dir->i_ino);
+ fnode->flags |= FNODE_dir;
+ fnode->btree.n_free_nodes = 7;
+ fnode->btree.n_used_nodes = 1;
+ fnode->btree.first_free = cpu_to_le16(0x14);
+ fnode->u.external[0].disk_secno = cpu_to_le32(dno);
+ fnode->u.external[0].file_secno = cpu_to_le32(-1);
+ dnode->root_dnode = 1;
+ dnode->up = cpu_to_le32(fno);
+ de = hpfs_add_de(dir->i_sb, dnode, "\001\001", 2, 0);
+ de->creation_date = de->write_date = de->read_date = cpu_to_le32(local_get_seconds(dir->i_sb));
+ if (!(mode & 0222)) de->read_only = 1;
+ de->first = de->directory = 1;
+ /*de->hidden = de->system = 0;*/
+ de->fnode = cpu_to_le32(fno);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ hpfs_mark_4buffers_dirty(&qbh0);
+ hpfs_brelse4(&qbh0);
+ inc_nlink(dir);
+ insert_inode_hash(result);
+
+ if (!uid_eq(result->i_uid, current_fsuid()) ||
+ !gid_eq(result->i_gid, current_fsgid()) ||
+ result->i_mode != (mode | S_IFDIR)) {
+ result->i_uid = current_fsuid();
+ result->i_gid = current_fsgid();
+ result->i_mode = mode | S_IFDIR;
+ hpfs_write_inode_nolock(result);
+ }
+ hpfs_update_directory_times(dir);
+ d_instantiate(dentry, result);
+ hpfs_unlock(dir->i_sb);
+ return 0;
+bail3:
+ iput(result);
+bail2:
+ hpfs_brelse4(&qbh0);
+ hpfs_free_dnode(dir->i_sb, dno);
+bail1:
+ brelse(bh);
+ hpfs_free_sectors(dir->i_sb, fno, 1);
+bail:
+ hpfs_unlock(dir->i_sb);
+ return err;
+}
+
+static int hpfs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct inode *result = NULL;
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ fnode_secno fno;
+ int r;
+ struct hpfs_dirent dee;
+ int err;
+ if ((err = hpfs_chk_name(name, &len)))
+ return err==-ENOENT ? -EINVAL : err;
+ hpfs_lock(dir->i_sb);
+ err = -ENOSPC;
+ fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
+ if (!fnode)
+ goto bail;
+ memset(&dee, 0, sizeof dee);
+ if (!(mode & 0222)) dee.read_only = 1;
+ dee.archive = 1;
+ dee.hidden = name[0] == '.';
+ dee.fnode = cpu_to_le32(fno);
+ dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(local_get_seconds(dir->i_sb));
+
+ result = new_inode(dir->i_sb);
+ if (!result)
+ goto bail1;
+
+ hpfs_init_inode(result);
+ result->i_ino = fno;
+ result->i_mode |= S_IFREG;
+ result->i_mode &= ~0111;
+ result->i_op = &hpfs_file_iops;
+ result->i_fop = &hpfs_file_ops;
+ set_nlink(result, 1);
+ hpfs_i(result)->i_parent_dir = dir->i_ino;
+ result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
+ result->i_ctime.tv_nsec = 0;
+ result->i_mtime.tv_nsec = 0;
+ result->i_atime.tv_nsec = 0;
+ hpfs_i(result)->i_ea_size = 0;
+ if (dee.read_only)
+ result->i_mode &= ~0222;
+ result->i_blocks = 1;
+ result->i_size = 0;
+ result->i_data.a_ops = &hpfs_aops;
+ hpfs_i(result)->mmu_private = 0;
+
+ r = hpfs_add_dirent(dir, name, len, &dee);
+ if (r == 1)
+ goto bail2;
+ if (r == -1) {
+ err = -EEXIST;
+ goto bail2;
+ }
+ fnode->len = len;
+ memcpy(fnode->name, name, len > 15 ? 15 : len);
+ fnode->up = cpu_to_le32(dir->i_ino);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+
+ insert_inode_hash(result);
+
+ if (!uid_eq(result->i_uid, current_fsuid()) ||
+ !gid_eq(result->i_gid, current_fsgid()) ||
+ result->i_mode != (mode | S_IFREG)) {
+ result->i_uid = current_fsuid();
+ result->i_gid = current_fsgid();
+ result->i_mode = mode | S_IFREG;
+ hpfs_write_inode_nolock(result);
+ }
+ hpfs_update_directory_times(dir);
+ d_instantiate(dentry, result);
+ hpfs_unlock(dir->i_sb);
+ return 0;
+
+bail2:
+ iput(result);
+bail1:
+ brelse(bh);
+ hpfs_free_sectors(dir->i_sb, fno, 1);
+bail:
+ hpfs_unlock(dir->i_sb);
+ return err;
+}
+
+static int hpfs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ fnode_secno fno;
+ int r;
+ struct hpfs_dirent dee;
+ struct inode *result = NULL;
+ int err;
+ if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
+ if (hpfs_sb(dir->i_sb)->sb_eas < 2) return -EPERM;
+ hpfs_lock(dir->i_sb);
+ err = -ENOSPC;
+ fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
+ if (!fnode)
+ goto bail;
+ memset(&dee, 0, sizeof dee);
+ if (!(mode & 0222)) dee.read_only = 1;
+ dee.archive = 1;
+ dee.hidden = name[0] == '.';
+ dee.fnode = cpu_to_le32(fno);
+ dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(local_get_seconds(dir->i_sb));
+
+ result = new_inode(dir->i_sb);
+ if (!result)
+ goto bail1;
+
+ hpfs_init_inode(result);
+ result->i_ino = fno;
+ hpfs_i(result)->i_parent_dir = dir->i_ino;
+ result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
+ result->i_ctime.tv_nsec = 0;
+ result->i_mtime.tv_nsec = 0;
+ result->i_atime.tv_nsec = 0;
+ hpfs_i(result)->i_ea_size = 0;
+ result->i_uid = current_fsuid();
+ result->i_gid = current_fsgid();
+ set_nlink(result, 1);
+ result->i_size = 0;
+ result->i_blocks = 1;
+ init_special_inode(result, mode, rdev);
+
+ r = hpfs_add_dirent(dir, name, len, &dee);
+ if (r == 1)
+ goto bail2;
+ if (r == -1) {
+ err = -EEXIST;
+ goto bail2;
+ }
+ fnode->len = len;
+ memcpy(fnode->name, name, len > 15 ? 15 : len);
+ fnode->up = cpu_to_le32(dir->i_ino);
+ mark_buffer_dirty(bh);
+
+ insert_inode_hash(result);
+
+ hpfs_write_inode_nolock(result);
+ hpfs_update_directory_times(dir);
+ d_instantiate(dentry, result);
+ brelse(bh);
+ hpfs_unlock(dir->i_sb);
+ return 0;
+bail2:
+ iput(result);
+bail1:
+ brelse(bh);
+ hpfs_free_sectors(dir->i_sb, fno, 1);
+bail:
+ hpfs_unlock(dir->i_sb);
+ return err;
+}
+
+static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *symlink)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ fnode_secno fno;
+ int r;
+ struct hpfs_dirent dee;
+ struct inode *result;
+ int err;
+ if ((err = hpfs_chk_name(name, &len))) return err==-ENOENT ? -EINVAL : err;
+ hpfs_lock(dir->i_sb);
+ if (hpfs_sb(dir->i_sb)->sb_eas < 2) {
+ hpfs_unlock(dir->i_sb);
+ return -EPERM;
+ }
+ err = -ENOSPC;
+ fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
+ if (!fnode)
+ goto bail;
+ memset(&dee, 0, sizeof dee);
+ dee.archive = 1;
+ dee.hidden = name[0] == '.';
+ dee.fnode = cpu_to_le32(fno);
+ dee.creation_date = dee.write_date = dee.read_date = cpu_to_le32(local_get_seconds(dir->i_sb));
+
+ result = new_inode(dir->i_sb);
+ if (!result)
+ goto bail1;
+ result->i_ino = fno;
+ hpfs_init_inode(result);
+ hpfs_i(result)->i_parent_dir = dir->i_ino;
+ result->i_ctime.tv_sec = result->i_mtime.tv_sec = result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(dee.creation_date));
+ result->i_ctime.tv_nsec = 0;
+ result->i_mtime.tv_nsec = 0;
+ result->i_atime.tv_nsec = 0;
+ hpfs_i(result)->i_ea_size = 0;
+ result->i_mode = S_IFLNK | 0777;
+ result->i_uid = current_fsuid();
+ result->i_gid = current_fsgid();
+ result->i_blocks = 1;
+ set_nlink(result, 1);
+ result->i_size = strlen(symlink);
+ inode_nohighmem(result);
+ result->i_op = &page_symlink_inode_operations;
+ result->i_data.a_ops = &hpfs_symlink_aops;
+
+ r = hpfs_add_dirent(dir, name, len, &dee);
+ if (r == 1)
+ goto bail2;
+ if (r == -1) {
+ err = -EEXIST;
+ goto bail2;
+ }
+ fnode->len = len;
+ memcpy(fnode->name, name, len > 15 ? 15 : len);
+ fnode->up = cpu_to_le32(dir->i_ino);
+ hpfs_set_ea(result, fnode, "SYMLINK", symlink, strlen(symlink));
+ mark_buffer_dirty(bh);
+ brelse(bh);
+
+ insert_inode_hash(result);
+
+ hpfs_write_inode_nolock(result);
+ hpfs_update_directory_times(dir);
+ d_instantiate(dentry, result);
+ hpfs_unlock(dir->i_sb);
+ return 0;
+bail2:
+ iput(result);
+bail1:
+ brelse(bh);
+ hpfs_free_sectors(dir->i_sb, fno, 1);
+bail:
+ hpfs_unlock(dir->i_sb);
+ return err;
+}
+
+static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de;
+ struct inode *inode = d_inode(dentry);
+ dnode_secno dno;
+ int r;
+ int err;
+
+ hpfs_lock(dir->i_sb);
+ hpfs_adjust_length(name, &len);
+
+ err = -ENOENT;
+ de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
+ if (!de)
+ goto out;
+
+ err = -EPERM;
+ if (de->first)
+ goto out1;
+
+ err = -EISDIR;
+ if (de->directory)
+ goto out1;
+
+ r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
+ switch (r) {
+ case 1:
+ hpfs_error(dir->i_sb, "there was error when removing dirent");
+ err = -EFSERROR;
+ break;
+ case 2: /* no space for deleting */
+ err = -ENOSPC;
+ break;
+ default:
+ drop_nlink(inode);
+ err = 0;
+ }
+ goto out;
+
+out1:
+ hpfs_brelse4(&qbh);
+out:
+ if (!err)
+ hpfs_update_directory_times(dir);
+ hpfs_unlock(dir->i_sb);
+ return err;
+}
+
+static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ const unsigned char *name = dentry->d_name.name;
+ unsigned len = dentry->d_name.len;
+ struct quad_buffer_head qbh;
+ struct hpfs_dirent *de;
+ struct inode *inode = d_inode(dentry);
+ dnode_secno dno;
+ int n_items = 0;
+ int err;
+ int r;
+
+ hpfs_adjust_length(name, &len);
+ hpfs_lock(dir->i_sb);
+ err = -ENOENT;
+ de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
+ if (!de)
+ goto out;
+
+ err = -EPERM;
+ if (de->first)
+ goto out1;
+
+ err = -ENOTDIR;
+ if (!de->directory)
+ goto out1;
+
+ hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
+ err = -ENOTEMPTY;
+ if (n_items)
+ goto out1;
+
+ r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
+ switch (r) {
+ case 1:
+ hpfs_error(dir->i_sb, "there was error when removing dirent");
+ err = -EFSERROR;
+ break;
+ case 2:
+ err = -ENOSPC;
+ break;
+ default:
+ drop_nlink(dir);
+ clear_nlink(inode);
+ err = 0;
+ }
+ goto out;
+out1:
+ hpfs_brelse4(&qbh);
+out:
+ if (!err)
+ hpfs_update_directory_times(dir);
+ hpfs_unlock(dir->i_sb);
+ return err;
+}
+
+static int hpfs_symlink_readpage(struct file *file, struct page *page)
+{
+ char *link = page_address(page);
+ struct inode *i = page->mapping->host;
+ struct fnode *fnode;
+ struct buffer_head *bh;
+ int err;
+
+ err = -EIO;
+ hpfs_lock(i->i_sb);
+ if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh)))
+ goto fail;
+ err = hpfs_read_ea(i->i_sb, fnode, "SYMLINK", link, PAGE_SIZE);
+ brelse(bh);
+ if (err)
+ goto fail;
+ hpfs_unlock(i->i_sb);
+ SetPageUptodate(page);
+ unlock_page(page);
+ return 0;
+
+fail:
+ hpfs_unlock(i->i_sb);
+ SetPageError(page);
+ unlock_page(page);
+ return err;
+}
+
+const struct address_space_operations hpfs_symlink_aops = {
+ .readpage = hpfs_symlink_readpage
+};
+
+static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry,
+ unsigned int flags)
+{
+ const unsigned char *old_name = old_dentry->d_name.name;
+ unsigned old_len = old_dentry->d_name.len;
+ const unsigned char *new_name = new_dentry->d_name.name;
+ unsigned new_len = new_dentry->d_name.len;
+ struct inode *i = d_inode(old_dentry);
+ struct inode *new_inode = d_inode(new_dentry);
+ struct quad_buffer_head qbh, qbh1;
+ struct hpfs_dirent *dep, *nde;
+ struct hpfs_dirent de;
+ dnode_secno dno;
+ int r;
+ struct buffer_head *bh;
+ struct fnode *fnode;
+ int err;
+
+ if (flags & ~RENAME_NOREPLACE)
+ return -EINVAL;
+
+ if ((err = hpfs_chk_name(new_name, &new_len))) return err;
+ err = 0;
+ hpfs_adjust_length(old_name, &old_len);
+
+ hpfs_lock(i->i_sb);
+ /* order doesn't matter, due to VFS exclusion */
+
+ /* Erm? Moving over the empty non-busy directory is perfectly legal */
+ if (new_inode && S_ISDIR(new_inode->i_mode)) {
+ err = -EINVAL;
+ goto end1;
+ }
+
+ if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
+ hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
+ err = -ENOENT;
+ goto end1;
+ }
+ copy_de(&de, dep);
+ de.hidden = new_name[0] == '.';
+
+ if (new_inode) {
+ int r;
+ if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
+ if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
+ clear_nlink(new_inode);
+ copy_de(nde, &de);
+ memcpy(nde->name, new_name, new_len);
+ hpfs_mark_4buffers_dirty(&qbh1);
+ hpfs_brelse4(&qbh1);
+ goto end;
+ }
+ hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
+ err = -EFSERROR;
+ goto end1;
+ }
+ err = -ENOSPC;
+ goto end1;
+ }
+
+ if (new_dir == old_dir) hpfs_brelse4(&qbh);
+
+ if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
+ if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
+ err = r == 1 ? -ENOSPC : -EFSERROR;
+ if (new_dir != old_dir) hpfs_brelse4(&qbh);
+ goto end1;
+ }
+
+ if (new_dir == old_dir)
+ if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
+ hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
+ err = -ENOENT;
+ goto end1;
+ }
+
+ if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
+ hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
+ err = r == 2 ? -ENOSPC : -EFSERROR;
+ goto end1;
+ }
+
+end:
+ hpfs_i(i)->i_parent_dir = new_dir->i_ino;
+ if (S_ISDIR(i->i_mode)) {
+ inc_nlink(new_dir);
+ drop_nlink(old_dir);
+ }
+ if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
+ fnode->up = cpu_to_le32(new_dir->i_ino);
+ fnode->len = new_len;
+ memcpy(fnode->name, new_name, new_len>15?15:new_len);
+ if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ }
+end1:
+ if (!err) {
+ hpfs_update_directory_times(old_dir);
+ hpfs_update_directory_times(new_dir);
+ }
+ hpfs_unlock(i->i_sb);
+ return err;
+}
+
+const struct inode_operations hpfs_dir_iops =
+{
+ .create = hpfs_create,
+ .lookup = hpfs_lookup,
+ .unlink = hpfs_unlink,
+ .symlink = hpfs_symlink,
+ .mkdir = hpfs_mkdir,
+ .rmdir = hpfs_rmdir,
+ .mknod = hpfs_mknod,
+ .rename = hpfs_rename,
+ .setattr = hpfs_setattr,
+};
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
new file mode 100644
index 000000000..a7dbfc892
--- /dev/null
+++ b/fs/hpfs/super.c
@@ -0,0 +1,793 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * linux/fs/hpfs/super.c
+ *
+ * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
+ *
+ * mounting, unmounting, error handling
+ */
+
+#include "hpfs_fn.h"
+#include <linux/module.h>
+#include <linux/parser.h>
+#include <linux/init.h>
+#include <linux/statfs.h>
+#include <linux/magic.h>
+#include <linux/sched.h>
+#include <linux/bitmap.h>
+#include <linux/slab.h>
+#include <linux/seq_file.h>
+
+/* Mark the filesystem dirty, so that chkdsk checks it when os/2 booted */
+
+static void mark_dirty(struct super_block *s, int remount)
+{
+ if (hpfs_sb(s)->sb_chkdsk && (remount || !sb_rdonly(s))) {
+ struct buffer_head *bh;
+ struct hpfs_spare_block *sb;
+ if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
+ sb->dirty = 1;
+ sb->old_wrote = 0;
+ mark_buffer_dirty(bh);
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+ }
+}
+
+/* Mark the filesystem clean (mark it dirty for chkdsk if chkdsk==2 or if there
+ were errors) */
+
+static void unmark_dirty(struct super_block *s)
+{
+ struct buffer_head *bh;
+ struct hpfs_spare_block *sb;
+ if (sb_rdonly(s)) return;
+ sync_blockdev(s->s_bdev);
+ if ((sb = hpfs_map_sector(s, 17, &bh, 0))) {
+ sb->dirty = hpfs_sb(s)->sb_chkdsk > 1 - hpfs_sb(s)->sb_was_error;
+ sb->old_wrote = hpfs_sb(s)->sb_chkdsk >= 2 && !hpfs_sb(s)->sb_was_error;
+ mark_buffer_dirty(bh);
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+}
+
+/* Filesystem error... */
+void hpfs_error(struct super_block *s, const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+
+ va_start(args, fmt);
+
+ vaf.fmt = fmt;
+ vaf.va = &args;
+
+ pr_err("filesystem error: %pV", &vaf);
+
+ va_end(args);
+
+ if (!hpfs_sb(s)->sb_was_error) {
+ if (hpfs_sb(s)->sb_err == 2) {
+ pr_cont("; crashing the system because you wanted it\n");
+ mark_dirty(s, 0);
+ panic("HPFS panic");
+ } else if (hpfs_sb(s)->sb_err == 1) {
+ if (sb_rdonly(s))
+ pr_cont("; already mounted read-only\n");
+ else {
+ pr_cont("; remounting read-only\n");
+ mark_dirty(s, 0);
+ s->s_flags |= SB_RDONLY;
+ }
+ } else if (sb_rdonly(s))
+ pr_cont("; going on - but anything won't be destroyed because it's read-only\n");
+ else
+ pr_cont("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
+ } else
+ pr_cont("\n");
+ hpfs_sb(s)->sb_was_error = 1;
+}
+
+/*
+ * A little trick to detect cycles in many hpfs structures and don't let the
+ * kernel crash on corrupted filesystem. When first called, set c2 to 0.
+ *
+ * BTW. chkdsk doesn't detect cycles correctly. When I had 2 lost directories
+ * nested each in other, chkdsk locked up happilly.
+ */
+
+int hpfs_stop_cycles(struct super_block *s, int key, int *c1, int *c2,
+ char *msg)
+{
+ if (*c2 && *c1 == key) {
+ hpfs_error(s, "cycle detected on key %08x in %s", key, msg);
+ return 1;
+ }
+ (*c2)++;
+ if (!((*c2 - 1) & *c2)) *c1 = key;
+ return 0;
+}
+
+static void free_sbi(struct hpfs_sb_info *sbi)
+{
+ kfree(sbi->sb_cp_table);
+ kfree(sbi->sb_bmp_dir);
+ kfree(sbi);
+}
+
+static void lazy_free_sbi(struct rcu_head *rcu)
+{
+ free_sbi(container_of(rcu, struct hpfs_sb_info, rcu));
+}
+
+static void hpfs_put_super(struct super_block *s)
+{
+ hpfs_lock(s);
+ unmark_dirty(s);
+ hpfs_unlock(s);
+ call_rcu(&hpfs_sb(s)->rcu, lazy_free_sbi);
+}
+
+static unsigned hpfs_count_one_bitmap(struct super_block *s, secno secno)
+{
+ struct quad_buffer_head qbh;
+ unsigned long *bits;
+ unsigned count;
+
+ bits = hpfs_map_4sectors(s, secno, &qbh, 0);
+ if (!bits)
+ return (unsigned)-1;
+ count = bitmap_weight(bits, 2048 * BITS_PER_BYTE);
+ hpfs_brelse4(&qbh);
+ return count;
+}
+
+static unsigned count_bitmaps(struct super_block *s)
+{
+ unsigned n, count, n_bands;
+ n_bands = (hpfs_sb(s)->sb_fs_size + 0x3fff) >> 14;
+ count = 0;
+ for (n = 0; n < COUNT_RD_AHEAD; n++) {
+ hpfs_prefetch_bitmap(s, n);
+ }
+ for (n = 0; n < n_bands; n++) {
+ unsigned c;
+ hpfs_prefetch_bitmap(s, n + COUNT_RD_AHEAD);
+ c = hpfs_count_one_bitmap(s, le32_to_cpu(hpfs_sb(s)->sb_bmp_dir[n]));
+ if (c != (unsigned)-1)
+ count += c;
+ }
+ return count;
+}
+
+unsigned hpfs_get_free_dnodes(struct super_block *s)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free_dnodes == (unsigned)-1) {
+ unsigned c = hpfs_count_one_bitmap(s, sbi->sb_dmap);
+ if (c == (unsigned)-1)
+ return 0;
+ sbi->sb_n_free_dnodes = c;
+ }
+ return sbi->sb_n_free_dnodes;
+}
+
+static int hpfs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ struct super_block *s = dentry->d_sb;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ u64 id = huge_encode_dev(s->s_bdev->bd_dev);
+
+ hpfs_lock(s);
+
+ if (sbi->sb_n_free == (unsigned)-1)
+ sbi->sb_n_free = count_bitmaps(s);
+
+ buf->f_type = s->s_magic;
+ buf->f_bsize = 512;
+ buf->f_blocks = sbi->sb_fs_size;
+ buf->f_bfree = sbi->sb_n_free;
+ buf->f_bavail = sbi->sb_n_free;
+ buf->f_files = sbi->sb_dirband_size / 4;
+ buf->f_ffree = hpfs_get_free_dnodes(s);
+ buf->f_fsid = u64_to_fsid(id);
+ buf->f_namelen = 254;
+
+ hpfs_unlock(s);
+
+ return 0;
+}
+
+
+long hpfs_ioctl(struct file *file, unsigned cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case FITRIM: {
+ struct fstrim_range range;
+ secno n_trimmed;
+ int r;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range)))
+ return -EFAULT;
+ r = hpfs_trim_fs(file_inode(file)->i_sb, range.start >> 9, (range.start + range.len) >> 9, (range.minlen + 511) >> 9, &n_trimmed);
+ if (r)
+ return r;
+ range.len = (u64)n_trimmed << 9;
+ if (copy_to_user((struct fstrim_range __user *)arg, &range, sizeof(range)))
+ return -EFAULT;
+ return 0;
+ }
+ default: {
+ return -ENOIOCTLCMD;
+ }
+ }
+}
+
+
+static struct kmem_cache * hpfs_inode_cachep;
+
+static struct inode *hpfs_alloc_inode(struct super_block *sb)
+{
+ struct hpfs_inode_info *ei;
+ ei = kmem_cache_alloc(hpfs_inode_cachep, GFP_NOFS);
+ if (!ei)
+ return NULL;
+ return &ei->vfs_inode;
+}
+
+static void hpfs_free_inode(struct inode *inode)
+{
+ kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
+}
+
+static void init_once(void *foo)
+{
+ struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
+
+ inode_init_once(&ei->vfs_inode);
+}
+
+static int init_inodecache(void)
+{
+ hpfs_inode_cachep = kmem_cache_create("hpfs_inode_cache",
+ sizeof(struct hpfs_inode_info),
+ 0, (SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD|SLAB_ACCOUNT),
+ init_once);
+ if (hpfs_inode_cachep == NULL)
+ return -ENOMEM;
+ return 0;
+}
+
+static void destroy_inodecache(void)
+{
+ /*
+ * Make sure all delayed rcu free inodes are flushed before we
+ * destroy cache.
+ */
+ rcu_barrier();
+ kmem_cache_destroy(hpfs_inode_cachep);
+}
+
+/*
+ * A tiny parser for option strings, stolen from dosfs.
+ * Stolen again from read-only hpfs.
+ * And updated for table-driven option parsing.
+ */
+
+enum {
+ Opt_help, Opt_uid, Opt_gid, Opt_umask, Opt_case_lower, Opt_case_asis,
+ Opt_check_none, Opt_check_normal, Opt_check_strict,
+ Opt_err_cont, Opt_err_ro, Opt_err_panic,
+ Opt_eas_no, Opt_eas_ro, Opt_eas_rw,
+ Opt_chkdsk_no, Opt_chkdsk_errors, Opt_chkdsk_always,
+ Opt_timeshift, Opt_err,
+};
+
+static const match_table_t tokens = {
+ {Opt_help, "help"},
+ {Opt_uid, "uid=%u"},
+ {Opt_gid, "gid=%u"},
+ {Opt_umask, "umask=%o"},
+ {Opt_case_lower, "case=lower"},
+ {Opt_case_asis, "case=asis"},
+ {Opt_check_none, "check=none"},
+ {Opt_check_normal, "check=normal"},
+ {Opt_check_strict, "check=strict"},
+ {Opt_err_cont, "errors=continue"},
+ {Opt_err_ro, "errors=remount-ro"},
+ {Opt_err_panic, "errors=panic"},
+ {Opt_eas_no, "eas=no"},
+ {Opt_eas_ro, "eas=ro"},
+ {Opt_eas_rw, "eas=rw"},
+ {Opt_chkdsk_no, "chkdsk=no"},
+ {Opt_chkdsk_errors, "chkdsk=errors"},
+ {Opt_chkdsk_always, "chkdsk=always"},
+ {Opt_timeshift, "timeshift=%d"},
+ {Opt_err, NULL},
+};
+
+static int parse_opts(char *opts, kuid_t *uid, kgid_t *gid, umode_t *umask,
+ int *lowercase, int *eas, int *chk, int *errs,
+ int *chkdsk, int *timeshift)
+{
+ char *p;
+ int option;
+
+ if (!opts)
+ return 1;
+
+ /*pr_info("Parsing opts: '%s'\n",opts);*/
+
+ while ((p = strsep(&opts, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ int token;
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_help:
+ return 2;
+ case Opt_uid:
+ if (match_int(args, &option))
+ return 0;
+ *uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(*uid))
+ return 0;
+ break;
+ case Opt_gid:
+ if (match_int(args, &option))
+ return 0;
+ *gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(*gid))
+ return 0;
+ break;
+ case Opt_umask:
+ if (match_octal(args, &option))
+ return 0;
+ *umask = option;
+ break;
+ case Opt_case_lower:
+ *lowercase = 1;
+ break;
+ case Opt_case_asis:
+ *lowercase = 0;
+ break;
+ case Opt_check_none:
+ *chk = 0;
+ break;
+ case Opt_check_normal:
+ *chk = 1;
+ break;
+ case Opt_check_strict:
+ *chk = 2;
+ break;
+ case Opt_err_cont:
+ *errs = 0;
+ break;
+ case Opt_err_ro:
+ *errs = 1;
+ break;
+ case Opt_err_panic:
+ *errs = 2;
+ break;
+ case Opt_eas_no:
+ *eas = 0;
+ break;
+ case Opt_eas_ro:
+ *eas = 1;
+ break;
+ case Opt_eas_rw:
+ *eas = 2;
+ break;
+ case Opt_chkdsk_no:
+ *chkdsk = 0;
+ break;
+ case Opt_chkdsk_errors:
+ *chkdsk = 1;
+ break;
+ case Opt_chkdsk_always:
+ *chkdsk = 2;
+ break;
+ case Opt_timeshift:
+ {
+ int m = 1;
+ char *rhs = args[0].from;
+ if (!rhs || !*rhs)
+ return 0;
+ if (*rhs == '-') m = -1;
+ if (*rhs == '+' || *rhs == '-') rhs++;
+ *timeshift = simple_strtoul(rhs, &rhs, 0) * m;
+ if (*rhs)
+ return 0;
+ break;
+ }
+ default:
+ return 0;
+ }
+ }
+ return 1;
+}
+
+static inline void hpfs_help(void)
+{
+ pr_info("\n\
+HPFS filesystem options:\n\
+ help do not mount and display this text\n\
+ uid=xxx set uid of files that don't have uid specified in eas\n\
+ gid=xxx set gid of files that don't have gid specified in eas\n\
+ umask=xxx set mode of files that don't have mode specified in eas\n\
+ case=lower lowercase all files\n\
+ case=asis do not lowercase files (default)\n\
+ check=none no fs checks - kernel may crash on corrupted filesystem\n\
+ check=normal do some checks - it should not crash (default)\n\
+ check=strict do extra time-consuming checks, used for debugging\n\
+ errors=continue continue on errors\n\
+ errors=remount-ro remount read-only if errors found (default)\n\
+ errors=panic panic on errors\n\
+ chkdsk=no do not mark fs for chkdsking even if there were errors\n\
+ chkdsk=errors mark fs dirty if errors found (default)\n\
+ chkdsk=always always mark fs dirty - used for debugging\n\
+ eas=no ignore extended attributes\n\
+ eas=ro read but do not write extended attributes\n\
+ eas=rw r/w eas => enables chmod, chown, mknod, ln -s (default)\n\
+ timeshift=nnn add nnn seconds to file times\n\
+\n");
+}
+
+static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
+{
+ kuid_t uid;
+ kgid_t gid;
+ umode_t umask;
+ int lowercase, eas, chk, errs, chkdsk, timeshift;
+ int o;
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+
+ sync_filesystem(s);
+
+ *flags |= SB_NOATIME;
+
+ hpfs_lock(s);
+ uid = sbi->sb_uid; gid = sbi->sb_gid;
+ umask = 0777 & ~sbi->sb_mode;
+ lowercase = sbi->sb_lowercase;
+ eas = sbi->sb_eas; chk = sbi->sb_chk; chkdsk = sbi->sb_chkdsk;
+ errs = sbi->sb_err; timeshift = sbi->sb_timeshift;
+
+ if (!(o = parse_opts(data, &uid, &gid, &umask, &lowercase,
+ &eas, &chk, &errs, &chkdsk, &timeshift))) {
+ pr_err("bad mount options.\n");
+ goto out_err;
+ }
+ if (o == 2) {
+ hpfs_help();
+ goto out_err;
+ }
+ if (timeshift != sbi->sb_timeshift) {
+ pr_err("timeshift can't be changed using remount.\n");
+ goto out_err;
+ }
+
+ unmark_dirty(s);
+
+ sbi->sb_uid = uid; sbi->sb_gid = gid;
+ sbi->sb_mode = 0777 & ~umask;
+ sbi->sb_lowercase = lowercase;
+ sbi->sb_eas = eas; sbi->sb_chk = chk; sbi->sb_chkdsk = chkdsk;
+ sbi->sb_err = errs; sbi->sb_timeshift = timeshift;
+
+ if (!(*flags & SB_RDONLY)) mark_dirty(s, 1);
+
+ hpfs_unlock(s);
+ return 0;
+
+out_err:
+ hpfs_unlock(s);
+ return -EINVAL;
+}
+
+static int hpfs_show_options(struct seq_file *seq, struct dentry *root)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(root->d_sb);
+
+ seq_printf(seq, ",uid=%u", from_kuid_munged(&init_user_ns, sbi->sb_uid));
+ seq_printf(seq, ",gid=%u", from_kgid_munged(&init_user_ns, sbi->sb_gid));
+ seq_printf(seq, ",umask=%03o", (~sbi->sb_mode & 0777));
+ if (sbi->sb_lowercase)
+ seq_printf(seq, ",case=lower");
+ if (!sbi->sb_chk)
+ seq_printf(seq, ",check=none");
+ if (sbi->sb_chk == 2)
+ seq_printf(seq, ",check=strict");
+ if (!sbi->sb_err)
+ seq_printf(seq, ",errors=continue");
+ if (sbi->sb_err == 2)
+ seq_printf(seq, ",errors=panic");
+ if (!sbi->sb_chkdsk)
+ seq_printf(seq, ",chkdsk=no");
+ if (sbi->sb_chkdsk == 2)
+ seq_printf(seq, ",chkdsk=always");
+ if (!sbi->sb_eas)
+ seq_printf(seq, ",eas=no");
+ if (sbi->sb_eas == 1)
+ seq_printf(seq, ",eas=ro");
+ if (sbi->sb_timeshift)
+ seq_printf(seq, ",timeshift=%d", sbi->sb_timeshift);
+ return 0;
+}
+
+/* Super operations */
+
+static const struct super_operations hpfs_sops =
+{
+ .alloc_inode = hpfs_alloc_inode,
+ .free_inode = hpfs_free_inode,
+ .evict_inode = hpfs_evict_inode,
+ .put_super = hpfs_put_super,
+ .statfs = hpfs_statfs,
+ .remount_fs = hpfs_remount_fs,
+ .show_options = hpfs_show_options,
+};
+
+static int hpfs_fill_super(struct super_block *s, void *options, int silent)
+{
+ struct buffer_head *bh0, *bh1, *bh2;
+ struct hpfs_boot_block *bootblock;
+ struct hpfs_super_block *superblock;
+ struct hpfs_spare_block *spareblock;
+ struct hpfs_sb_info *sbi;
+ struct inode *root;
+
+ kuid_t uid;
+ kgid_t gid;
+ umode_t umask;
+ int lowercase, eas, chk, errs, chkdsk, timeshift;
+
+ dnode_secno root_dno;
+ struct hpfs_dirent *de = NULL;
+ struct quad_buffer_head qbh;
+
+ int o;
+
+ sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
+ if (!sbi) {
+ return -ENOMEM;
+ }
+ s->s_fs_info = sbi;
+
+ mutex_init(&sbi->hpfs_mutex);
+ hpfs_lock(s);
+
+ uid = current_uid();
+ gid = current_gid();
+ umask = current_umask();
+ lowercase = 0;
+ eas = 2;
+ chk = 1;
+ errs = 1;
+ chkdsk = 1;
+ timeshift = 0;
+
+ if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
+ &eas, &chk, &errs, &chkdsk, &timeshift))) {
+ pr_err("bad mount options.\n");
+ goto bail0;
+ }
+ if (o==2) {
+ hpfs_help();
+ goto bail0;
+ }
+
+ /*sbi->sb_mounting = 1;*/
+ sb_set_blocksize(s, 512);
+ sbi->sb_fs_size = -1;
+ if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
+ if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
+ if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;
+
+ /* Check magics */
+ if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC
+ ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC
+ || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
+ if (!silent)
+ pr_err("Bad magic ... probably not HPFS\n");
+ goto bail4;
+ }
+
+ /* Check version */
+ if (!sb_rdonly(s) && superblock->funcversion != 2 && superblock->funcversion != 3) {
+ pr_err("Bad version %d,%d. Mount readonly to go around\n",
+ (int)superblock->version, (int)superblock->funcversion);
+ pr_err("please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - mikulas@artax.karlin.mff.cuni.cz\n");
+ goto bail4;
+ }
+
+ s->s_flags |= SB_NOATIME;
+
+ /* Fill superblock stuff */
+ s->s_magic = HPFS_SUPER_MAGIC;
+ s->s_op = &hpfs_sops;
+ s->s_d_op = &hpfs_dentry_operations;
+ s->s_time_min = local_to_gmt(s, 0);
+ s->s_time_max = local_to_gmt(s, U32_MAX);
+
+ sbi->sb_root = le32_to_cpu(superblock->root);
+ sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
+ sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
+ sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
+ sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
+ sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
+ sbi->sb_uid = uid;
+ sbi->sb_gid = gid;
+ sbi->sb_mode = 0777 & ~umask;
+ sbi->sb_n_free = -1;
+ sbi->sb_n_free_dnodes = -1;
+ sbi->sb_lowercase = lowercase;
+ sbi->sb_eas = eas;
+ sbi->sb_chk = chk;
+ sbi->sb_chkdsk = chkdsk;
+ sbi->sb_err = errs;
+ sbi->sb_timeshift = timeshift;
+ sbi->sb_was_error = 0;
+ sbi->sb_cp_table = NULL;
+ sbi->sb_c_bitmap = -1;
+ sbi->sb_max_fwd_alloc = 0xffffff;
+
+ if (sbi->sb_fs_size >= 0x80000000) {
+ hpfs_error(s, "invalid size in superblock: %08x",
+ (unsigned)sbi->sb_fs_size);
+ goto bail4;
+ }
+
+ if (spareblock->n_spares_used)
+ hpfs_load_hotfix_map(s, spareblock);
+
+ /* Load bitmap directory */
+ if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
+ goto bail4;
+
+ /* Check for general fs errors*/
+ if (spareblock->dirty && !spareblock->old_wrote) {
+ if (errs == 2) {
+ pr_err("Improperly stopped, not mounted\n");
+ goto bail4;
+ }
+ hpfs_error(s, "improperly stopped");
+ }
+
+ if (!sb_rdonly(s)) {
+ spareblock->dirty = 1;
+ spareblock->old_wrote = 0;
+ mark_buffer_dirty(bh2);
+ }
+
+ if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
+ if (errs >= 2) {
+ pr_err("Spare dnodes used, try chkdsk\n");
+ mark_dirty(s, 0);
+ goto bail4;
+ }
+ hpfs_error(s, "warning: spare dnodes used, try chkdsk");
+ if (errs == 0)
+ pr_err("Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
+ }
+ if (chk) {
+ unsigned a;
+ if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
+ le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
+ hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
+ le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
+ goto bail4;
+ }
+ a = sbi->sb_dirband_size;
+ sbi->sb_dirband_size = 0;
+ if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
+ hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
+ hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
+ mark_dirty(s, 0);
+ goto bail4;
+ }
+ sbi->sb_dirband_size = a;
+ } else
+ pr_err("You really don't want any checks? You are crazy...\n");
+
+ /* Load code page table */
+ if (le32_to_cpu(spareblock->n_code_pages))
+ if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
+ pr_err("code page support is disabled\n");
+
+ brelse(bh2);
+ brelse(bh1);
+ brelse(bh0);
+
+ root = iget_locked(s, sbi->sb_root);
+ if (!root)
+ goto bail0;
+ hpfs_init_inode(root);
+ hpfs_read_inode(root);
+ unlock_new_inode(root);
+ s->s_root = d_make_root(root);
+ if (!s->s_root)
+ goto bail0;
+
+ /*
+ * find the root directory's . pointer & finish filling in the inode
+ */
+
+ root_dno = hpfs_fnode_dno(s, sbi->sb_root);
+ if (root_dno)
+ de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
+ if (!de)
+ hpfs_error(s, "unable to find root dir");
+ else {
+ root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
+ root->i_atime.tv_nsec = 0;
+ root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
+ root->i_mtime.tv_nsec = 0;
+ root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
+ root->i_ctime.tv_nsec = 0;
+ hpfs_i(root)->i_ea_size = le32_to_cpu(de->ea_size);
+ hpfs_i(root)->i_parent_dir = root->i_ino;
+ if (root->i_size == -1)
+ root->i_size = 2048;
+ if (root->i_blocks == -1)
+ root->i_blocks = 5;
+ hpfs_brelse4(&qbh);
+ }
+ hpfs_unlock(s);
+ return 0;
+
+bail4: brelse(bh2);
+bail3: brelse(bh1);
+bail2: brelse(bh0);
+bail1:
+bail0:
+ hpfs_unlock(s);
+ free_sbi(sbi);
+ return -EINVAL;
+}
+
+static struct dentry *hpfs_mount(struct file_system_type *fs_type,
+ int flags, const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, hpfs_fill_super);
+}
+
+static struct file_system_type hpfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "hpfs",
+ .mount = hpfs_mount,
+ .kill_sb = kill_block_super,
+ .fs_flags = FS_REQUIRES_DEV,
+};
+MODULE_ALIAS_FS("hpfs");
+
+static int __init init_hpfs_fs(void)
+{
+ int err = init_inodecache();
+ if (err)
+ goto out1;
+ err = register_filesystem(&hpfs_fs_type);
+ if (err)
+ goto out;
+ return 0;
+out:
+ destroy_inodecache();
+out1:
+ return err;
+}
+
+static void __exit exit_hpfs_fs(void)
+{
+ unregister_filesystem(&hpfs_fs_type);
+ destroy_inodecache();
+}
+
+module_init(init_hpfs_fs)
+module_exit(exit_hpfs_fs)
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-22 05:47:51 +0000