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-rw-r--r--fs/ntfs/inode.c3102
1 files changed, 0 insertions, 3102 deletions
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
deleted file mode 100644
index aba1e22db4..0000000000
--- a/fs/ntfs/inode.c
+++ /dev/null
@@ -1,3102 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * inode.c - NTFS kernel inode handling.
- *
- * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
- */
-
-#include <linux/buffer_head.h>
-#include <linux/fs.h>
-#include <linux/mm.h>
-#include <linux/mount.h>
-#include <linux/mutex.h>
-#include <linux/pagemap.h>
-#include <linux/quotaops.h>
-#include <linux/slab.h>
-#include <linux/log2.h>
-
-#include "aops.h"
-#include "attrib.h"
-#include "bitmap.h"
-#include "dir.h"
-#include "debug.h"
-#include "inode.h"
-#include "lcnalloc.h"
-#include "malloc.h"
-#include "mft.h"
-#include "time.h"
-#include "ntfs.h"
-
-/**
- * ntfs_test_inode - compare two (possibly fake) inodes for equality
- * @vi: vfs inode which to test
- * @data: data which is being tested with
- *
- * Compare the ntfs attribute embedded in the ntfs specific part of the vfs
- * inode @vi for equality with the ntfs attribute @data.
- *
- * If searching for the normal file/directory inode, set @na->type to AT_UNUSED.
- * @na->name and @na->name_len are then ignored.
- *
- * Return 1 if the attributes match and 0 if not.
- *
- * NOTE: This function runs with the inode_hash_lock spin lock held so it is not
- * allowed to sleep.
- */
-int ntfs_test_inode(struct inode *vi, void *data)
-{
- ntfs_attr *na = (ntfs_attr *)data;
- ntfs_inode *ni;
-
- if (vi->i_ino != na->mft_no)
- return 0;
- ni = NTFS_I(vi);
- /* If !NInoAttr(ni), @vi is a normal file or directory inode. */
- if (likely(!NInoAttr(ni))) {
- /* If not looking for a normal inode this is a mismatch. */
- if (unlikely(na->type != AT_UNUSED))
- return 0;
- } else {
- /* A fake inode describing an attribute. */
- if (ni->type != na->type)
- return 0;
- if (ni->name_len != na->name_len)
- return 0;
- if (na->name_len && memcmp(ni->name, na->name,
- na->name_len * sizeof(ntfschar)))
- return 0;
- }
- /* Match! */
- return 1;
-}
-
-/**
- * ntfs_init_locked_inode - initialize an inode
- * @vi: vfs inode to initialize
- * @data: data which to initialize @vi to
- *
- * Initialize the vfs inode @vi with the values from the ntfs attribute @data in
- * order to enable ntfs_test_inode() to do its work.
- *
- * If initializing the normal file/directory inode, set @na->type to AT_UNUSED.
- * In that case, @na->name and @na->name_len should be set to NULL and 0,
- * respectively. Although that is not strictly necessary as
- * ntfs_read_locked_inode() will fill them in later.
- *
- * Return 0 on success and -errno on error.
- *
- * NOTE: This function runs with the inode->i_lock spin lock held so it is not
- * allowed to sleep. (Hence the GFP_ATOMIC allocation.)
- */
-static int ntfs_init_locked_inode(struct inode *vi, void *data)
-{
- ntfs_attr *na = (ntfs_attr *)data;
- ntfs_inode *ni = NTFS_I(vi);
-
- vi->i_ino = na->mft_no;
-
- ni->type = na->type;
- if (na->type == AT_INDEX_ALLOCATION)
- NInoSetMstProtected(ni);
-
- ni->name = na->name;
- ni->name_len = na->name_len;
-
- /* If initializing a normal inode, we are done. */
- if (likely(na->type == AT_UNUSED)) {
- BUG_ON(na->name);
- BUG_ON(na->name_len);
- return 0;
- }
-
- /* It is a fake inode. */
- NInoSetAttr(ni);
-
- /*
- * We have I30 global constant as an optimization as it is the name
- * in >99.9% of named attributes! The other <0.1% incur a GFP_ATOMIC
- * allocation but that is ok. And most attributes are unnamed anyway,
- * thus the fraction of named attributes with name != I30 is actually
- * absolutely tiny.
- */
- if (na->name_len && na->name != I30) {
- unsigned int i;
-
- BUG_ON(!na->name);
- i = na->name_len * sizeof(ntfschar);
- ni->name = kmalloc(i + sizeof(ntfschar), GFP_ATOMIC);
- if (!ni->name)
- return -ENOMEM;
- memcpy(ni->name, na->name, i);
- ni->name[na->name_len] = 0;
- }
- return 0;
-}
-
-static int ntfs_read_locked_inode(struct inode *vi);
-static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi);
-static int ntfs_read_locked_index_inode(struct inode *base_vi,
- struct inode *vi);
-
-/**
- * ntfs_iget - obtain a struct inode corresponding to a specific normal inode
- * @sb: super block of mounted volume
- * @mft_no: mft record number / inode number to obtain
- *
- * Obtain the struct inode corresponding to a specific normal inode (i.e. a
- * file or directory).
- *
- * If the inode is in the cache, it is just returned with an increased
- * reference count. Otherwise, a new struct inode is allocated and initialized,
- * and finally ntfs_read_locked_inode() is called to read in the inode and
- * fill in the remainder of the inode structure.
- *
- * Return the struct inode on success. Check the return value with IS_ERR() and
- * if true, the function failed and the error code is obtained from PTR_ERR().
- */
-struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no)
-{
- struct inode *vi;
- int err;
- ntfs_attr na;
-
- na.mft_no = mft_no;
- na.type = AT_UNUSED;
- na.name = NULL;
- na.name_len = 0;
-
- vi = iget5_locked(sb, mft_no, ntfs_test_inode,
- ntfs_init_locked_inode, &na);
- if (unlikely(!vi))
- return ERR_PTR(-ENOMEM);
-
- err = 0;
-
- /* If this is a freshly allocated inode, need to read it now. */
- if (vi->i_state & I_NEW) {
- err = ntfs_read_locked_inode(vi);
- unlock_new_inode(vi);
- }
- /*
- * There is no point in keeping bad inodes around if the failure was
- * due to ENOMEM. We want to be able to retry again later.
- */
- if (unlikely(err == -ENOMEM)) {
- iput(vi);
- vi = ERR_PTR(err);
- }
- return vi;
-}
-
-/**
- * ntfs_attr_iget - obtain a struct inode corresponding to an attribute
- * @base_vi: vfs base inode containing the attribute
- * @type: attribute type
- * @name: Unicode name of the attribute (NULL if unnamed)
- * @name_len: length of @name in Unicode characters (0 if unnamed)
- *
- * Obtain the (fake) struct inode corresponding to the attribute specified by
- * @type, @name, and @name_len, which is present in the base mft record
- * specified by the vfs inode @base_vi.
- *
- * If the attribute inode is in the cache, it is just returned with an
- * increased reference count. Otherwise, a new struct inode is allocated and
- * initialized, and finally ntfs_read_locked_attr_inode() is called to read the
- * attribute and fill in the inode structure.
- *
- * Note, for index allocation attributes, you need to use ntfs_index_iget()
- * instead of ntfs_attr_iget() as working with indices is a lot more complex.
- *
- * Return the struct inode of the attribute inode on success. Check the return
- * value with IS_ERR() and if true, the function failed and the error code is
- * obtained from PTR_ERR().
- */
-struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPE type,
- ntfschar *name, u32 name_len)
-{
- struct inode *vi;
- int err;
- ntfs_attr na;
-
- /* Make sure no one calls ntfs_attr_iget() for indices. */
- BUG_ON(type == AT_INDEX_ALLOCATION);
-
- na.mft_no = base_vi->i_ino;
- na.type = type;
- na.name = name;
- na.name_len = name_len;
-
- vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
- ntfs_init_locked_inode, &na);
- if (unlikely(!vi))
- return ERR_PTR(-ENOMEM);
-
- err = 0;
-
- /* If this is a freshly allocated inode, need to read it now. */
- if (vi->i_state & I_NEW) {
- err = ntfs_read_locked_attr_inode(base_vi, vi);
- unlock_new_inode(vi);
- }
- /*
- * There is no point in keeping bad attribute inodes around. This also
- * simplifies things in that we never need to check for bad attribute
- * inodes elsewhere.
- */
- if (unlikely(err)) {
- iput(vi);
- vi = ERR_PTR(err);
- }
- return vi;
-}
-
-/**
- * ntfs_index_iget - obtain a struct inode corresponding to an index
- * @base_vi: vfs base inode containing the index related attributes
- * @name: Unicode name of the index
- * @name_len: length of @name in Unicode characters
- *
- * Obtain the (fake) struct inode corresponding to the index specified by @name
- * and @name_len, which is present in the base mft record specified by the vfs
- * inode @base_vi.
- *
- * If the index inode is in the cache, it is just returned with an increased
- * reference count. Otherwise, a new struct inode is allocated and
- * initialized, and finally ntfs_read_locked_index_inode() is called to read
- * the index related attributes and fill in the inode structure.
- *
- * Return the struct inode of the index inode on success. Check the return
- * value with IS_ERR() and if true, the function failed and the error code is
- * obtained from PTR_ERR().
- */
-struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
- u32 name_len)
-{
- struct inode *vi;
- int err;
- ntfs_attr na;
-
- na.mft_no = base_vi->i_ino;
- na.type = AT_INDEX_ALLOCATION;
- na.name = name;
- na.name_len = name_len;
-
- vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
- ntfs_init_locked_inode, &na);
- if (unlikely(!vi))
- return ERR_PTR(-ENOMEM);
-
- err = 0;
-
- /* If this is a freshly allocated inode, need to read it now. */
- if (vi->i_state & I_NEW) {
- err = ntfs_read_locked_index_inode(base_vi, vi);
- unlock_new_inode(vi);
- }
- /*
- * There is no point in keeping bad index inodes around. This also
- * simplifies things in that we never need to check for bad index
- * inodes elsewhere.
- */
- if (unlikely(err)) {
- iput(vi);
- vi = ERR_PTR(err);
- }
- return vi;
-}
-
-struct inode *ntfs_alloc_big_inode(struct super_block *sb)
-{
- ntfs_inode *ni;
-
- ntfs_debug("Entering.");
- ni = alloc_inode_sb(sb, ntfs_big_inode_cache, GFP_NOFS);
- if (likely(ni != NULL)) {
- ni->state = 0;
- return VFS_I(ni);
- }
- ntfs_error(sb, "Allocation of NTFS big inode structure failed.");
- return NULL;
-}
-
-void ntfs_free_big_inode(struct inode *inode)
-{
- kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
-}
-
-static inline ntfs_inode *ntfs_alloc_extent_inode(void)
-{
- ntfs_inode *ni;
-
- ntfs_debug("Entering.");
- ni = kmem_cache_alloc(ntfs_inode_cache, GFP_NOFS);
- if (likely(ni != NULL)) {
- ni->state = 0;
- return ni;
- }
- ntfs_error(NULL, "Allocation of NTFS inode structure failed.");
- return NULL;
-}
-
-static void ntfs_destroy_extent_inode(ntfs_inode *ni)
-{
- ntfs_debug("Entering.");
- BUG_ON(ni->page);
- if (!atomic_dec_and_test(&ni->count))
- BUG();
- kmem_cache_free(ntfs_inode_cache, ni);
-}
-
-/*
- * The attribute runlist lock has separate locking rules from the
- * normal runlist lock, so split the two lock-classes:
- */
-static struct lock_class_key attr_list_rl_lock_class;
-
-/**
- * __ntfs_init_inode - initialize ntfs specific part of an inode
- * @sb: super block of mounted volume
- * @ni: freshly allocated ntfs inode which to initialize
- *
- * Initialize an ntfs inode to defaults.
- *
- * NOTE: ni->mft_no, ni->state, ni->type, ni->name, and ni->name_len are left
- * untouched. Make sure to initialize them elsewhere.
- *
- * Return zero on success and -ENOMEM on error.
- */
-void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
-{
- ntfs_debug("Entering.");
- rwlock_init(&ni->size_lock);
- ni->initialized_size = ni->allocated_size = 0;
- ni->seq_no = 0;
- atomic_set(&ni->count, 1);
- ni->vol = NTFS_SB(sb);
- ntfs_init_runlist(&ni->runlist);
- mutex_init(&ni->mrec_lock);
- ni->page = NULL;
- ni->page_ofs = 0;
- ni->attr_list_size = 0;
- ni->attr_list = NULL;
- ntfs_init_runlist(&ni->attr_list_rl);
- lockdep_set_class(&ni->attr_list_rl.lock,
- &attr_list_rl_lock_class);
- ni->itype.index.block_size = 0;
- ni->itype.index.vcn_size = 0;
- ni->itype.index.collation_rule = 0;
- ni->itype.index.block_size_bits = 0;
- ni->itype.index.vcn_size_bits = 0;
- mutex_init(&ni->extent_lock);
- ni->nr_extents = 0;
- ni->ext.base_ntfs_ino = NULL;
-}
-
-/*
- * Extent inodes get MFT-mapped in a nested way, while the base inode
- * is still mapped. Teach this nesting to the lock validator by creating
- * a separate class for nested inode's mrec_lock's:
- */
-static struct lock_class_key extent_inode_mrec_lock_key;
-
-inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
- unsigned long mft_no)
-{
- ntfs_inode *ni = ntfs_alloc_extent_inode();
-
- ntfs_debug("Entering.");
- if (likely(ni != NULL)) {
- __ntfs_init_inode(sb, ni);
- lockdep_set_class(&ni->mrec_lock, &extent_inode_mrec_lock_key);
- ni->mft_no = mft_no;
- ni->type = AT_UNUSED;
- ni->name = NULL;
- ni->name_len = 0;
- }
- return ni;
-}
-
-/**
- * ntfs_is_extended_system_file - check if a file is in the $Extend directory
- * @ctx: initialized attribute search context
- *
- * Search all file name attributes in the inode described by the attribute
- * search context @ctx and check if any of the names are in the $Extend system
- * directory.
- *
- * Return values:
- * 1: file is in $Extend directory
- * 0: file is not in $Extend directory
- * -errno: failed to determine if the file is in the $Extend directory
- */
-static int ntfs_is_extended_system_file(ntfs_attr_search_ctx *ctx)
-{
- int nr_links, err;
-
- /* Restart search. */
- ntfs_attr_reinit_search_ctx(ctx);
-
- /* Get number of hard links. */
- nr_links = le16_to_cpu(ctx->mrec->link_count);
-
- /* Loop through all hard links. */
- while (!(err = ntfs_attr_lookup(AT_FILE_NAME, NULL, 0, 0, 0, NULL, 0,
- ctx))) {
- FILE_NAME_ATTR *file_name_attr;
- ATTR_RECORD *attr = ctx->attr;
- u8 *p, *p2;
-
- nr_links--;
- /*
- * Maximum sanity checking as we are called on an inode that
- * we suspect might be corrupt.
- */
- p = (u8*)attr + le32_to_cpu(attr->length);
- if (p < (u8*)ctx->mrec || (u8*)p > (u8*)ctx->mrec +
- le32_to_cpu(ctx->mrec->bytes_in_use)) {
-err_corrupt_attr:
- ntfs_error(ctx->ntfs_ino->vol->sb, "Corrupt file name "
- "attribute. You should run chkdsk.");
- return -EIO;
- }
- if (attr->non_resident) {
- ntfs_error(ctx->ntfs_ino->vol->sb, "Non-resident file "
- "name. You should run chkdsk.");
- return -EIO;
- }
- if (attr->flags) {
- ntfs_error(ctx->ntfs_ino->vol->sb, "File name with "
- "invalid flags. You should run "
- "chkdsk.");
- return -EIO;
- }
- if (!(attr->data.resident.flags & RESIDENT_ATTR_IS_INDEXED)) {
- ntfs_error(ctx->ntfs_ino->vol->sb, "Unindexed file "
- "name. You should run chkdsk.");
- return -EIO;
- }
- file_name_attr = (FILE_NAME_ATTR*)((u8*)attr +
- le16_to_cpu(attr->data.resident.value_offset));
- p2 = (u8 *)file_name_attr + le32_to_cpu(attr->data.resident.value_length);
- if (p2 < (u8*)attr || p2 > p)
- goto err_corrupt_attr;
- /* This attribute is ok, but is it in the $Extend directory? */
- if (MREF_LE(file_name_attr->parent_directory) == FILE_Extend)
- return 1; /* YES, it's an extended system file. */
- }
- if (unlikely(err != -ENOENT))
- return err;
- if (unlikely(nr_links)) {
- ntfs_error(ctx->ntfs_ino->vol->sb, "Inode hard link count "
- "doesn't match number of name attributes. You "
- "should run chkdsk.");
- return -EIO;
- }
- return 0; /* NO, it is not an extended system file. */
-}
-
-/**
- * ntfs_read_locked_inode - read an inode from its device
- * @vi: inode to read
- *
- * ntfs_read_locked_inode() is called from ntfs_iget() to read the inode
- * described by @vi into memory from the device.
- *
- * The only fields in @vi that we need to/can look at when the function is
- * called are i_sb, pointing to the mounted device's super block, and i_ino,
- * the number of the inode to load.
- *
- * ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino
- * for reading and sets up the necessary @vi fields as well as initializing
- * the ntfs inode.
- *
- * Q: What locks are held when the function is called?
- * A: i_state has I_NEW set, hence the inode is locked, also
- * i_count is set to 1, so it is not going to go away
- * i_flags is set to 0 and we have no business touching it. Only an ioctl()
- * is allowed to write to them. We should of course be honouring them but
- * we need to do that using the IS_* macros defined in include/linux/fs.h.
- * In any case ntfs_read_locked_inode() has nothing to do with i_flags.
- *
- * Return 0 on success and -errno on error. In the error case, the inode will
- * have had make_bad_inode() executed on it.
- */
-static int ntfs_read_locked_inode(struct inode *vi)
-{
- ntfs_volume *vol = NTFS_SB(vi->i_sb);
- ntfs_inode *ni;
- struct inode *bvi;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- STANDARD_INFORMATION *si;
- ntfs_attr_search_ctx *ctx;
- int err = 0;
-
- ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
-
- /* Setup the generic vfs inode parts now. */
- vi->i_uid = vol->uid;
- vi->i_gid = vol->gid;
- vi->i_mode = 0;
-
- /*
- * Initialize the ntfs specific part of @vi special casing
- * FILE_MFT which we need to do at mount time.
- */
- if (vi->i_ino != FILE_MFT)
- ntfs_init_big_inode(vi);
- ni = NTFS_I(vi);
-
- m = map_mft_record(ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(ni, m);
- if (!ctx) {
- err = -ENOMEM;
- goto unm_err_out;
- }
-
- if (!(m->flags & MFT_RECORD_IN_USE)) {
- ntfs_error(vi->i_sb, "Inode is not in use!");
- goto unm_err_out;
- }
- if (m->base_mft_record) {
- ntfs_error(vi->i_sb, "Inode is an extent inode!");
- goto unm_err_out;
- }
-
- /* Transfer information from mft record into vfs and ntfs inodes. */
- vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
-
- /*
- * FIXME: Keep in mind that link_count is two for files which have both
- * a long file name and a short file name as separate entries, so if
- * we are hiding short file names this will be too high. Either we need
- * to account for the short file names by subtracting them or we need
- * to make sure we delete files even though i_nlink is not zero which
- * might be tricky due to vfs interactions. Need to think about this
- * some more when implementing the unlink command.
- */
- set_nlink(vi, le16_to_cpu(m->link_count));
- /*
- * FIXME: Reparse points can have the directory bit set even though
- * they would be S_IFLNK. Need to deal with this further below when we
- * implement reparse points / symbolic links but it will do for now.
- * Also if not a directory, it could be something else, rather than
- * a regular file. But again, will do for now.
- */
- /* Everyone gets all permissions. */
- vi->i_mode |= S_IRWXUGO;
- /* If read-only, no one gets write permissions. */
- if (IS_RDONLY(vi))
- vi->i_mode &= ~S_IWUGO;
- if (m->flags & MFT_RECORD_IS_DIRECTORY) {
- vi->i_mode |= S_IFDIR;
- /*
- * Apply the directory permissions mask set in the mount
- * options.
- */
- vi->i_mode &= ~vol->dmask;
- /* Things break without this kludge! */
- if (vi->i_nlink > 1)
- set_nlink(vi, 1);
- } else {
- vi->i_mode |= S_IFREG;
- /* Apply the file permissions mask set in the mount options. */
- vi->i_mode &= ~vol->fmask;
- }
- /*
- * Find the standard information attribute in the mft record. At this
- * stage we haven't setup the attribute list stuff yet, so this could
- * in fact fail if the standard information is in an extent record, but
- * I don't think this actually ever happens.
- */
- err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0, 0, 0, NULL, 0,
- ctx);
- if (unlikely(err)) {
- if (err == -ENOENT) {
- /*
- * TODO: We should be performing a hot fix here (if the
- * recover mount option is set) by creating a new
- * attribute.
- */
- ntfs_error(vi->i_sb, "$STANDARD_INFORMATION attribute "
- "is missing.");
- }
- goto unm_err_out;
- }
- a = ctx->attr;
- /* Get the standard information attribute value. */
- if ((u8 *)a + le16_to_cpu(a->data.resident.value_offset)
- + le32_to_cpu(a->data.resident.value_length) >
- (u8 *)ctx->mrec + vol->mft_record_size) {
- ntfs_error(vi->i_sb, "Corrupt standard information attribute in inode.");
- goto unm_err_out;
- }
- si = (STANDARD_INFORMATION*)((u8*)a +
- le16_to_cpu(a->data.resident.value_offset));
-
- /* Transfer information from the standard information into vi. */
- /*
- * Note: The i_?times do not quite map perfectly onto the NTFS times,
- * but they are close enough, and in the end it doesn't really matter
- * that much...
- */
- /*
- * mtime is the last change of the data within the file. Not changed
- * when only metadata is changed, e.g. a rename doesn't affect mtime.
- */
- inode_set_mtime_to_ts(vi, ntfs2utc(si->last_data_change_time));
- /*
- * ctime is the last change of the metadata of the file. This obviously
- * always changes, when mtime is changed. ctime can be changed on its
- * own, mtime is then not changed, e.g. when a file is renamed.
- */
- inode_set_ctime_to_ts(vi, ntfs2utc(si->last_mft_change_time));
- /*
- * Last access to the data within the file. Not changed during a rename
- * for example but changed whenever the file is written to.
- */
- inode_set_atime_to_ts(vi, ntfs2utc(si->last_access_time));
-
- /* Find the attribute list attribute if present. */
- ntfs_attr_reinit_search_ctx(ctx);
- err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
- if (err) {
- if (unlikely(err != -ENOENT)) {
- ntfs_error(vi->i_sb, "Failed to lookup attribute list "
- "attribute.");
- goto unm_err_out;
- }
- } else /* if (!err) */ {
- if (vi->i_ino == FILE_MFT)
- goto skip_attr_list_load;
- ntfs_debug("Attribute list found in inode 0x%lx.", vi->i_ino);
- NInoSetAttrList(ni);
- a = ctx->attr;
- if (a->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(vi->i_sb, "Attribute list attribute is "
- "compressed.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_IS_ENCRYPTED ||
- a->flags & ATTR_IS_SPARSE) {
- if (a->non_resident) {
- ntfs_error(vi->i_sb, "Non-resident attribute "
- "list attribute is encrypted/"
- "sparse.");
- goto unm_err_out;
- }
- ntfs_warning(vi->i_sb, "Resident attribute list "
- "attribute in inode 0x%lx is marked "
- "encrypted/sparse which is not true. "
- "However, Windows allows this and "
- "chkdsk does not detect or correct it "
- "so we will just ignore the invalid "
- "flags and pretend they are not set.",
- vi->i_ino);
- }
- /* Now allocate memory for the attribute list. */
- ni->attr_list_size = (u32)ntfs_attr_size(a);
- ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
- if (!ni->attr_list) {
- ntfs_error(vi->i_sb, "Not enough memory to allocate "
- "buffer for attribute list.");
- err = -ENOMEM;
- goto unm_err_out;
- }
- if (a->non_resident) {
- NInoSetAttrListNonResident(ni);
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(vi->i_sb, "Attribute list has non "
- "zero lowest_vcn.");
- goto unm_err_out;
- }
- /*
- * Setup the runlist. No need for locking as we have
- * exclusive access to the inode at this time.
- */
- ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
- a, NULL);
- if (IS_ERR(ni->attr_list_rl.rl)) {
- err = PTR_ERR(ni->attr_list_rl.rl);
- ni->attr_list_rl.rl = NULL;
- ntfs_error(vi->i_sb, "Mapping pairs "
- "decompression failed.");
- goto unm_err_out;
- }
- /* Now load the attribute list. */
- if ((err = load_attribute_list(vol, &ni->attr_list_rl,
- ni->attr_list, ni->attr_list_size,
- sle64_to_cpu(a->data.non_resident.
- initialized_size)))) {
- ntfs_error(vi->i_sb, "Failed to load "
- "attribute list attribute.");
- goto unm_err_out;
- }
- } else /* if (!a->non_resident) */ {
- if ((u8*)a + le16_to_cpu(a->data.resident.value_offset)
- + le32_to_cpu(
- a->data.resident.value_length) >
- (u8*)ctx->mrec + vol->mft_record_size) {
- ntfs_error(vi->i_sb, "Corrupt attribute list "
- "in inode.");
- goto unm_err_out;
- }
- /* Now copy the attribute list. */
- memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
- a->data.resident.value_offset),
- le32_to_cpu(
- a->data.resident.value_length));
- }
- }
-skip_attr_list_load:
- /*
- * If an attribute list is present we now have the attribute list value
- * in ntfs_ino->attr_list and it is ntfs_ino->attr_list_size bytes.
- */
- if (S_ISDIR(vi->i_mode)) {
- loff_t bvi_size;
- ntfs_inode *bni;
- INDEX_ROOT *ir;
- u8 *ir_end, *index_end;
-
- /* It is a directory, find index root attribute. */
- ntfs_attr_reinit_search_ctx(ctx);
- err = ntfs_attr_lookup(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE,
- 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT) {
- // FIXME: File is corrupt! Hot-fix with empty
- // index root attribute if recovery option is
- // set.
- ntfs_error(vi->i_sb, "$INDEX_ROOT attribute "
- "is missing.");
- }
- goto unm_err_out;
- }
- a = ctx->attr;
- /* Set up the state. */
- if (unlikely(a->non_resident)) {
- ntfs_error(vol->sb, "$INDEX_ROOT attribute is not "
- "resident.");
- goto unm_err_out;
- }
- /* Ensure the attribute name is placed before the value. */
- if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
- le16_to_cpu(a->data.resident.value_offset)))) {
- ntfs_error(vol->sb, "$INDEX_ROOT attribute name is "
- "placed after the attribute value.");
- goto unm_err_out;
- }
- /*
- * Compressed/encrypted index root just means that the newly
- * created files in that directory should be created compressed/
- * encrypted. However index root cannot be both compressed and
- * encrypted.
- */
- if (a->flags & ATTR_COMPRESSION_MASK)
- NInoSetCompressed(ni);
- if (a->flags & ATTR_IS_ENCRYPTED) {
- if (a->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(vi->i_sb, "Found encrypted and "
- "compressed attribute.");
- goto unm_err_out;
- }
- NInoSetEncrypted(ni);
- }
- if (a->flags & ATTR_IS_SPARSE)
- NInoSetSparse(ni);
- ir = (INDEX_ROOT*)((u8*)a +
- le16_to_cpu(a->data.resident.value_offset));
- ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
- if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
- ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
- "corrupt.");
- goto unm_err_out;
- }
- index_end = (u8*)&ir->index +
- le32_to_cpu(ir->index.index_length);
- if (index_end > ir_end) {
- ntfs_error(vi->i_sb, "Directory index is corrupt.");
- goto unm_err_out;
- }
- if (ir->type != AT_FILE_NAME) {
- ntfs_error(vi->i_sb, "Indexed attribute is not "
- "$FILE_NAME.");
- goto unm_err_out;
- }
- if (ir->collation_rule != COLLATION_FILE_NAME) {
- ntfs_error(vi->i_sb, "Index collation rule is not "
- "COLLATION_FILE_NAME.");
- goto unm_err_out;
- }
- ni->itype.index.collation_rule = ir->collation_rule;
- ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
- if (ni->itype.index.block_size &
- (ni->itype.index.block_size - 1)) {
- ntfs_error(vi->i_sb, "Index block size (%u) is not a "
- "power of two.",
- ni->itype.index.block_size);
- goto unm_err_out;
- }
- if (ni->itype.index.block_size > PAGE_SIZE) {
- ntfs_error(vi->i_sb, "Index block size (%u) > "
- "PAGE_SIZE (%ld) is not "
- "supported. Sorry.",
- ni->itype.index.block_size,
- PAGE_SIZE);
- err = -EOPNOTSUPP;
- goto unm_err_out;
- }
- if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
- ntfs_error(vi->i_sb, "Index block size (%u) < "
- "NTFS_BLOCK_SIZE (%i) is not "
- "supported. Sorry.",
- ni->itype.index.block_size,
- NTFS_BLOCK_SIZE);
- err = -EOPNOTSUPP;
- goto unm_err_out;
- }
- ni->itype.index.block_size_bits =
- ffs(ni->itype.index.block_size) - 1;
- /* Determine the size of a vcn in the directory index. */
- if (vol->cluster_size <= ni->itype.index.block_size) {
- ni->itype.index.vcn_size = vol->cluster_size;
- ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
- } else {
- ni->itype.index.vcn_size = vol->sector_size;
- ni->itype.index.vcn_size_bits = vol->sector_size_bits;
- }
-
- /* Setup the index allocation attribute, even if not present. */
- NInoSetMstProtected(ni);
- ni->type = AT_INDEX_ALLOCATION;
- ni->name = I30;
- ni->name_len = 4;
-
- if (!(ir->index.flags & LARGE_INDEX)) {
- /* No index allocation. */
- vi->i_size = ni->initialized_size =
- ni->allocated_size = 0;
- /* We are done with the mft record, so we release it. */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(ni);
- m = NULL;
- ctx = NULL;
- goto skip_large_dir_stuff;
- } /* LARGE_INDEX: Index allocation present. Setup state. */
- NInoSetIndexAllocPresent(ni);
- /* Find index allocation attribute. */
- ntfs_attr_reinit_search_ctx(ctx);
- err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, I30, 4,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION "
- "attribute is not present but "
- "$INDEX_ROOT indicated it is.");
- else
- ntfs_error(vi->i_sb, "Failed to lookup "
- "$INDEX_ALLOCATION "
- "attribute.");
- goto unm_err_out;
- }
- a = ctx->attr;
- if (!a->non_resident) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
- "is resident.");
- goto unm_err_out;
- }
- /*
- * Ensure the attribute name is placed before the mapping pairs
- * array.
- */
- if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
- le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset)))) {
- ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name "
- "is placed after the mapping pairs "
- "array.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_IS_ENCRYPTED) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
- "is encrypted.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_IS_SPARSE) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
- "is sparse.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
- "is compressed.");
- goto unm_err_out;
- }
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(vi->i_sb, "First extent of "
- "$INDEX_ALLOCATION attribute has non "
- "zero lowest_vcn.");
- goto unm_err_out;
- }
- vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
- ni->initialized_size = sle64_to_cpu(
- a->data.non_resident.initialized_size);
- ni->allocated_size = sle64_to_cpu(
- a->data.non_resident.allocated_size);
- /*
- * We are done with the mft record, so we release it. Otherwise
- * we would deadlock in ntfs_attr_iget().
- */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(ni);
- m = NULL;
- ctx = NULL;
- /* Get the index bitmap attribute inode. */
- bvi = ntfs_attr_iget(vi, AT_BITMAP, I30, 4);
- if (IS_ERR(bvi)) {
- ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
- err = PTR_ERR(bvi);
- goto unm_err_out;
- }
- bni = NTFS_I(bvi);
- if (NInoCompressed(bni) || NInoEncrypted(bni) ||
- NInoSparse(bni)) {
- ntfs_error(vi->i_sb, "$BITMAP attribute is compressed "
- "and/or encrypted and/or sparse.");
- goto iput_unm_err_out;
- }
- /* Consistency check bitmap size vs. index allocation size. */
- bvi_size = i_size_read(bvi);
- if ((bvi_size << 3) < (vi->i_size >>
- ni->itype.index.block_size_bits)) {
- ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) "
- "for index allocation (0x%llx).",
- bvi_size << 3, vi->i_size);
- goto iput_unm_err_out;
- }
- /* No longer need the bitmap attribute inode. */
- iput(bvi);
-skip_large_dir_stuff:
- /* Setup the operations for this inode. */
- vi->i_op = &ntfs_dir_inode_ops;
- vi->i_fop = &ntfs_dir_ops;
- vi->i_mapping->a_ops = &ntfs_mst_aops;
- } else {
- /* It is a file. */
- ntfs_attr_reinit_search_ctx(ctx);
-
- /* Setup the data attribute, even if not present. */
- ni->type = AT_DATA;
- ni->name = NULL;
- ni->name_len = 0;
-
- /* Find first extent of the unnamed data attribute. */
- err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- vi->i_size = ni->initialized_size =
- ni->allocated_size = 0;
- if (err != -ENOENT) {
- ntfs_error(vi->i_sb, "Failed to lookup $DATA "
- "attribute.");
- goto unm_err_out;
- }
- /*
- * FILE_Secure does not have an unnamed $DATA
- * attribute, so we special case it here.
- */
- if (vi->i_ino == FILE_Secure)
- goto no_data_attr_special_case;
- /*
- * Most if not all the system files in the $Extend
- * system directory do not have unnamed data
- * attributes so we need to check if the parent
- * directory of the file is FILE_Extend and if it is
- * ignore this error. To do this we need to get the
- * name of this inode from the mft record as the name
- * contains the back reference to the parent directory.
- */
- if (ntfs_is_extended_system_file(ctx) > 0)
- goto no_data_attr_special_case;
- // FIXME: File is corrupt! Hot-fix with empty data
- // attribute if recovery option is set.
- ntfs_error(vi->i_sb, "$DATA attribute is missing.");
- goto unm_err_out;
- }
- a = ctx->attr;
- /* Setup the state. */
- if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
- if (a->flags & ATTR_COMPRESSION_MASK) {
- NInoSetCompressed(ni);
- if (vol->cluster_size > 4096) {
- ntfs_error(vi->i_sb, "Found "
- "compressed data but "
- "compression is "
- "disabled due to "
- "cluster size (%i) > "
- "4kiB.",
- vol->cluster_size);
- goto unm_err_out;
- }
- if ((a->flags & ATTR_COMPRESSION_MASK)
- != ATTR_IS_COMPRESSED) {
- ntfs_error(vi->i_sb, "Found unknown "
- "compression method "
- "or corrupt file.");
- goto unm_err_out;
- }
- }
- if (a->flags & ATTR_IS_SPARSE)
- NInoSetSparse(ni);
- }
- if (a->flags & ATTR_IS_ENCRYPTED) {
- if (NInoCompressed(ni)) {
- ntfs_error(vi->i_sb, "Found encrypted and "
- "compressed data.");
- goto unm_err_out;
- }
- NInoSetEncrypted(ni);
- }
- if (a->non_resident) {
- NInoSetNonResident(ni);
- if (NInoCompressed(ni) || NInoSparse(ni)) {
- if (NInoCompressed(ni) && a->data.non_resident.
- compression_unit != 4) {
- ntfs_error(vi->i_sb, "Found "
- "non-standard "
- "compression unit (%u "
- "instead of 4). "
- "Cannot handle this.",
- a->data.non_resident.
- compression_unit);
- err = -EOPNOTSUPP;
- goto unm_err_out;
- }
- if (a->data.non_resident.compression_unit) {
- ni->itype.compressed.block_size = 1U <<
- (a->data.non_resident.
- compression_unit +
- vol->cluster_size_bits);
- ni->itype.compressed.block_size_bits =
- ffs(ni->itype.
- compressed.
- block_size) - 1;
- ni->itype.compressed.block_clusters =
- 1U << a->data.
- non_resident.
- compression_unit;
- } else {
- ni->itype.compressed.block_size = 0;
- ni->itype.compressed.block_size_bits =
- 0;
- ni->itype.compressed.block_clusters =
- 0;
- }
- ni->itype.compressed.size = sle64_to_cpu(
- a->data.non_resident.
- compressed_size);
- }
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(vi->i_sb, "First extent of $DATA "
- "attribute has non zero "
- "lowest_vcn.");
- goto unm_err_out;
- }
- vi->i_size = sle64_to_cpu(
- a->data.non_resident.data_size);
- ni->initialized_size = sle64_to_cpu(
- a->data.non_resident.initialized_size);
- ni->allocated_size = sle64_to_cpu(
- a->data.non_resident.allocated_size);
- } else { /* Resident attribute. */
- vi->i_size = ni->initialized_size = le32_to_cpu(
- a->data.resident.value_length);
- ni->allocated_size = le32_to_cpu(a->length) -
- le16_to_cpu(
- a->data.resident.value_offset);
- if (vi->i_size > ni->allocated_size) {
- ntfs_error(vi->i_sb, "Resident data attribute "
- "is corrupt (size exceeds "
- "allocation).");
- goto unm_err_out;
- }
- }
-no_data_attr_special_case:
- /* We are done with the mft record, so we release it. */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(ni);
- m = NULL;
- ctx = NULL;
- /* Setup the operations for this inode. */
- vi->i_op = &ntfs_file_inode_ops;
- vi->i_fop = &ntfs_file_ops;
- vi->i_mapping->a_ops = &ntfs_normal_aops;
- if (NInoMstProtected(ni))
- vi->i_mapping->a_ops = &ntfs_mst_aops;
- else if (NInoCompressed(ni))
- vi->i_mapping->a_ops = &ntfs_compressed_aops;
- }
- /*
- * The number of 512-byte blocks used on disk (for stat). This is in so
- * far inaccurate as it doesn't account for any named streams or other
- * special non-resident attributes, but that is how Windows works, too,
- * so we are at least consistent with Windows, if not entirely
- * consistent with the Linux Way. Doing it the Linux Way would cause a
- * significant slowdown as it would involve iterating over all
- * attributes in the mft record and adding the allocated/compressed
- * sizes of all non-resident attributes present to give us the Linux
- * correct size that should go into i_blocks (after division by 512).
- */
- if (S_ISREG(vi->i_mode) && (NInoCompressed(ni) || NInoSparse(ni)))
- vi->i_blocks = ni->itype.compressed.size >> 9;
- else
- vi->i_blocks = ni->allocated_size >> 9;
- ntfs_debug("Done.");
- return 0;
-iput_unm_err_out:
- iput(bvi);
-unm_err_out:
- if (!err)
- err = -EIO;
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(ni);
-err_out:
- ntfs_error(vol->sb, "Failed with error code %i. Marking corrupt "
- "inode 0x%lx as bad. Run chkdsk.", err, vi->i_ino);
- make_bad_inode(vi);
- if (err != -EOPNOTSUPP && err != -ENOMEM)
- NVolSetErrors(vol);
- return err;
-}
-
-/**
- * ntfs_read_locked_attr_inode - read an attribute inode from its base inode
- * @base_vi: base inode
- * @vi: attribute inode to read
- *
- * ntfs_read_locked_attr_inode() is called from ntfs_attr_iget() to read the
- * attribute inode described by @vi into memory from the base mft record
- * described by @base_ni.
- *
- * ntfs_read_locked_attr_inode() maps, pins and locks the base inode for
- * reading and looks up the attribute described by @vi before setting up the
- * necessary fields in @vi as well as initializing the ntfs inode.
- *
- * Q: What locks are held when the function is called?
- * A: i_state has I_NEW set, hence the inode is locked, also
- * i_count is set to 1, so it is not going to go away
- *
- * Return 0 on success and -errno on error. In the error case, the inode will
- * have had make_bad_inode() executed on it.
- *
- * Note this cannot be called for AT_INDEX_ALLOCATION.
- */
-static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
-{
- ntfs_volume *vol = NTFS_SB(vi->i_sb);
- ntfs_inode *ni, *base_ni;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- ntfs_attr_search_ctx *ctx;
- int err = 0;
-
- ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
-
- ntfs_init_big_inode(vi);
-
- ni = NTFS_I(vi);
- base_ni = NTFS_I(base_vi);
-
- /* Just mirror the values from the base inode. */
- vi->i_uid = base_vi->i_uid;
- vi->i_gid = base_vi->i_gid;
- set_nlink(vi, base_vi->i_nlink);
- inode_set_mtime_to_ts(vi, inode_get_mtime(base_vi));
- inode_set_ctime_to_ts(vi, inode_get_ctime(base_vi));
- inode_set_atime_to_ts(vi, inode_get_atime(base_vi));
- vi->i_generation = ni->seq_no = base_ni->seq_no;
-
- /* Set inode type to zero but preserve permissions. */
- vi->i_mode = base_vi->i_mode & ~S_IFMT;
-
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (!ctx) {
- err = -ENOMEM;
- goto unm_err_out;
- }
- /* Find the attribute. */
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err))
- goto unm_err_out;
- a = ctx->attr;
- if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
- if (a->flags & ATTR_COMPRESSION_MASK) {
- NInoSetCompressed(ni);
- if ((ni->type != AT_DATA) || (ni->type == AT_DATA &&
- ni->name_len)) {
- ntfs_error(vi->i_sb, "Found compressed "
- "non-data or named data "
- "attribute. Please report "
- "you saw this message to "
- "linux-ntfs-dev@lists."
- "sourceforge.net");
- goto unm_err_out;
- }
- if (vol->cluster_size > 4096) {
- ntfs_error(vi->i_sb, "Found compressed "
- "attribute but compression is "
- "disabled due to cluster size "
- "(%i) > 4kiB.",
- vol->cluster_size);
- goto unm_err_out;
- }
- if ((a->flags & ATTR_COMPRESSION_MASK) !=
- ATTR_IS_COMPRESSED) {
- ntfs_error(vi->i_sb, "Found unknown "
- "compression method.");
- goto unm_err_out;
- }
- }
- /*
- * The compressed/sparse flag set in an index root just means
- * to compress all files.
- */
- if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
- ntfs_error(vi->i_sb, "Found mst protected attribute "
- "but the attribute is %s. Please "
- "report you saw this message to "
- "linux-ntfs-dev@lists.sourceforge.net",
- NInoCompressed(ni) ? "compressed" :
- "sparse");
- goto unm_err_out;
- }
- if (a->flags & ATTR_IS_SPARSE)
- NInoSetSparse(ni);
- }
- if (a->flags & ATTR_IS_ENCRYPTED) {
- if (NInoCompressed(ni)) {
- ntfs_error(vi->i_sb, "Found encrypted and compressed "
- "data.");
- goto unm_err_out;
- }
- /*
- * The encryption flag set in an index root just means to
- * encrypt all files.
- */
- if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
- ntfs_error(vi->i_sb, "Found mst protected attribute "
- "but the attribute is encrypted. "
- "Please report you saw this message "
- "to linux-ntfs-dev@lists.sourceforge."
- "net");
- goto unm_err_out;
- }
- if (ni->type != AT_DATA) {
- ntfs_error(vi->i_sb, "Found encrypted non-data "
- "attribute.");
- goto unm_err_out;
- }
- NInoSetEncrypted(ni);
- }
- if (!a->non_resident) {
- /* Ensure the attribute name is placed before the value. */
- if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
- le16_to_cpu(a->data.resident.value_offset)))) {
- ntfs_error(vol->sb, "Attribute name is placed after "
- "the attribute value.");
- goto unm_err_out;
- }
- if (NInoMstProtected(ni)) {
- ntfs_error(vi->i_sb, "Found mst protected attribute "
- "but the attribute is resident. "
- "Please report you saw this message to "
- "linux-ntfs-dev@lists.sourceforge.net");
- goto unm_err_out;
- }
- vi->i_size = ni->initialized_size = le32_to_cpu(
- a->data.resident.value_length);
- ni->allocated_size = le32_to_cpu(a->length) -
- le16_to_cpu(a->data.resident.value_offset);
- if (vi->i_size > ni->allocated_size) {
- ntfs_error(vi->i_sb, "Resident attribute is corrupt "
- "(size exceeds allocation).");
- goto unm_err_out;
- }
- } else {
- NInoSetNonResident(ni);
- /*
- * Ensure the attribute name is placed before the mapping pairs
- * array.
- */
- if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
- le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset)))) {
- ntfs_error(vol->sb, "Attribute name is placed after "
- "the mapping pairs array.");
- goto unm_err_out;
- }
- if (NInoCompressed(ni) || NInoSparse(ni)) {
- if (NInoCompressed(ni) && a->data.non_resident.
- compression_unit != 4) {
- ntfs_error(vi->i_sb, "Found non-standard "
- "compression unit (%u instead "
- "of 4). Cannot handle this.",
- a->data.non_resident.
- compression_unit);
- err = -EOPNOTSUPP;
- goto unm_err_out;
- }
- if (a->data.non_resident.compression_unit) {
- ni->itype.compressed.block_size = 1U <<
- (a->data.non_resident.
- compression_unit +
- vol->cluster_size_bits);
- ni->itype.compressed.block_size_bits =
- ffs(ni->itype.compressed.
- block_size) - 1;
- ni->itype.compressed.block_clusters = 1U <<
- a->data.non_resident.
- compression_unit;
- } else {
- ni->itype.compressed.block_size = 0;
- ni->itype.compressed.block_size_bits = 0;
- ni->itype.compressed.block_clusters = 0;
- }
- ni->itype.compressed.size = sle64_to_cpu(
- a->data.non_resident.compressed_size);
- }
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(vi->i_sb, "First extent of attribute has "
- "non-zero lowest_vcn.");
- goto unm_err_out;
- }
- vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
- ni->initialized_size = sle64_to_cpu(
- a->data.non_resident.initialized_size);
- ni->allocated_size = sle64_to_cpu(
- a->data.non_resident.allocated_size);
- }
- vi->i_mapping->a_ops = &ntfs_normal_aops;
- if (NInoMstProtected(ni))
- vi->i_mapping->a_ops = &ntfs_mst_aops;
- else if (NInoCompressed(ni))
- vi->i_mapping->a_ops = &ntfs_compressed_aops;
- if ((NInoCompressed(ni) || NInoSparse(ni)) && ni->type != AT_INDEX_ROOT)
- vi->i_blocks = ni->itype.compressed.size >> 9;
- else
- vi->i_blocks = ni->allocated_size >> 9;
- /*
- * Make sure the base inode does not go away and attach it to the
- * attribute inode.
- */
- igrab(base_vi);
- ni->ext.base_ntfs_ino = base_ni;
- ni->nr_extents = -1;
-
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
-
- ntfs_debug("Done.");
- return 0;
-
-unm_err_out:
- if (!err)
- err = -EIO;
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
-err_out:
- ntfs_error(vol->sb, "Failed with error code %i while reading attribute "
- "inode (mft_no 0x%lx, type 0x%x, name_len %i). "
- "Marking corrupt inode and base inode 0x%lx as bad. "
- "Run chkdsk.", err, vi->i_ino, ni->type, ni->name_len,
- base_vi->i_ino);
- make_bad_inode(vi);
- if (err != -ENOMEM)
- NVolSetErrors(vol);
- return err;
-}
-
-/**
- * ntfs_read_locked_index_inode - read an index inode from its base inode
- * @base_vi: base inode
- * @vi: index inode to read
- *
- * ntfs_read_locked_index_inode() is called from ntfs_index_iget() to read the
- * index inode described by @vi into memory from the base mft record described
- * by @base_ni.
- *
- * ntfs_read_locked_index_inode() maps, pins and locks the base inode for
- * reading and looks up the attributes relating to the index described by @vi
- * before setting up the necessary fields in @vi as well as initializing the
- * ntfs inode.
- *
- * Note, index inodes are essentially attribute inodes (NInoAttr() is true)
- * with the attribute type set to AT_INDEX_ALLOCATION. Apart from that, they
- * are setup like directory inodes since directories are a special case of
- * indices ao they need to be treated in much the same way. Most importantly,
- * for small indices the index allocation attribute might not actually exist.
- * However, the index root attribute always exists but this does not need to
- * have an inode associated with it and this is why we define a new inode type
- * index. Also, like for directories, we need to have an attribute inode for
- * the bitmap attribute corresponding to the index allocation attribute and we
- * can store this in the appropriate field of the inode, just like we do for
- * normal directory inodes.
- *
- * Q: What locks are held when the function is called?
- * A: i_state has I_NEW set, hence the inode is locked, also
- * i_count is set to 1, so it is not going to go away
- *
- * Return 0 on success and -errno on error. In the error case, the inode will
- * have had make_bad_inode() executed on it.
- */
-static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
-{
- loff_t bvi_size;
- ntfs_volume *vol = NTFS_SB(vi->i_sb);
- ntfs_inode *ni, *base_ni, *bni;
- struct inode *bvi;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- ntfs_attr_search_ctx *ctx;
- INDEX_ROOT *ir;
- u8 *ir_end, *index_end;
- int err = 0;
-
- ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
- ntfs_init_big_inode(vi);
- ni = NTFS_I(vi);
- base_ni = NTFS_I(base_vi);
- /* Just mirror the values from the base inode. */
- vi->i_uid = base_vi->i_uid;
- vi->i_gid = base_vi->i_gid;
- set_nlink(vi, base_vi->i_nlink);
- inode_set_mtime_to_ts(vi, inode_get_mtime(base_vi));
- inode_set_ctime_to_ts(vi, inode_get_ctime(base_vi));
- inode_set_atime_to_ts(vi, inode_get_atime(base_vi));
- vi->i_generation = ni->seq_no = base_ni->seq_no;
- /* Set inode type to zero but preserve permissions. */
- vi->i_mode = base_vi->i_mode & ~S_IFMT;
- /* Map the mft record for the base inode. */
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (!ctx) {
- err = -ENOMEM;
- goto unm_err_out;
- }
- /* Find the index root attribute. */
- err = ntfs_attr_lookup(AT_INDEX_ROOT, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
- "missing.");
- goto unm_err_out;
- }
- a = ctx->attr;
- /* Set up the state. */
- if (unlikely(a->non_resident)) {
- ntfs_error(vol->sb, "$INDEX_ROOT attribute is not resident.");
- goto unm_err_out;
- }
- /* Ensure the attribute name is placed before the value. */
- if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
- le16_to_cpu(a->data.resident.value_offset)))) {
- ntfs_error(vol->sb, "$INDEX_ROOT attribute name is placed "
- "after the attribute value.");
- goto unm_err_out;
- }
- /*
- * Compressed/encrypted/sparse index root is not allowed, except for
- * directories of course but those are not dealt with here.
- */
- if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED |
- ATTR_IS_SPARSE)) {
- ntfs_error(vi->i_sb, "Found compressed/encrypted/sparse index "
- "root attribute.");
- goto unm_err_out;
- }
- ir = (INDEX_ROOT*)((u8*)a + le16_to_cpu(a->data.resident.value_offset));
- ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
- if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
- ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is corrupt.");
- goto unm_err_out;
- }
- index_end = (u8*)&ir->index + le32_to_cpu(ir->index.index_length);
- if (index_end > ir_end) {
- ntfs_error(vi->i_sb, "Index is corrupt.");
- goto unm_err_out;
- }
- if (ir->type) {
- ntfs_error(vi->i_sb, "Index type is not 0 (type is 0x%x).",
- le32_to_cpu(ir->type));
- goto unm_err_out;
- }
- ni->itype.index.collation_rule = ir->collation_rule;
- ntfs_debug("Index collation rule is 0x%x.",
- le32_to_cpu(ir->collation_rule));
- ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
- if (!is_power_of_2(ni->itype.index.block_size)) {
- ntfs_error(vi->i_sb, "Index block size (%u) is not a power of "
- "two.", ni->itype.index.block_size);
- goto unm_err_out;
- }
- if (ni->itype.index.block_size > PAGE_SIZE) {
- ntfs_error(vi->i_sb, "Index block size (%u) > PAGE_SIZE "
- "(%ld) is not supported. Sorry.",
- ni->itype.index.block_size, PAGE_SIZE);
- err = -EOPNOTSUPP;
- goto unm_err_out;
- }
- if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
- ntfs_error(vi->i_sb, "Index block size (%u) < NTFS_BLOCK_SIZE "
- "(%i) is not supported. Sorry.",
- ni->itype.index.block_size, NTFS_BLOCK_SIZE);
- err = -EOPNOTSUPP;
- goto unm_err_out;
- }
- ni->itype.index.block_size_bits = ffs(ni->itype.index.block_size) - 1;
- /* Determine the size of a vcn in the index. */
- if (vol->cluster_size <= ni->itype.index.block_size) {
- ni->itype.index.vcn_size = vol->cluster_size;
- ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
- } else {
- ni->itype.index.vcn_size = vol->sector_size;
- ni->itype.index.vcn_size_bits = vol->sector_size_bits;
- }
- /* Check for presence of index allocation attribute. */
- if (!(ir->index.flags & LARGE_INDEX)) {
- /* No index allocation. */
- vi->i_size = ni->initialized_size = ni->allocated_size = 0;
- /* We are done with the mft record, so we release it. */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- m = NULL;
- ctx = NULL;
- goto skip_large_index_stuff;
- } /* LARGE_INDEX: Index allocation present. Setup state. */
- NInoSetIndexAllocPresent(ni);
- /* Find index allocation attribute. */
- ntfs_attr_reinit_search_ctx(ctx);
- err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
- "not present but $INDEX_ROOT "
- "indicated it is.");
- else
- ntfs_error(vi->i_sb, "Failed to lookup "
- "$INDEX_ALLOCATION attribute.");
- goto unm_err_out;
- }
- a = ctx->attr;
- if (!a->non_resident) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
- "resident.");
- goto unm_err_out;
- }
- /*
- * Ensure the attribute name is placed before the mapping pairs array.
- */
- if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
- le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset)))) {
- ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name is "
- "placed after the mapping pairs array.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_IS_ENCRYPTED) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
- "encrypted.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_IS_SPARSE) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is sparse.");
- goto unm_err_out;
- }
- if (a->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
- "compressed.");
- goto unm_err_out;
- }
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(vi->i_sb, "First extent of $INDEX_ALLOCATION "
- "attribute has non zero lowest_vcn.");
- goto unm_err_out;
- }
- vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
- ni->initialized_size = sle64_to_cpu(
- a->data.non_resident.initialized_size);
- ni->allocated_size = sle64_to_cpu(a->data.non_resident.allocated_size);
- /*
- * We are done with the mft record, so we release it. Otherwise
- * we would deadlock in ntfs_attr_iget().
- */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- m = NULL;
- ctx = NULL;
- /* Get the index bitmap attribute inode. */
- bvi = ntfs_attr_iget(base_vi, AT_BITMAP, ni->name, ni->name_len);
- if (IS_ERR(bvi)) {
- ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
- err = PTR_ERR(bvi);
- goto unm_err_out;
- }
- bni = NTFS_I(bvi);
- if (NInoCompressed(bni) || NInoEncrypted(bni) ||
- NInoSparse(bni)) {
- ntfs_error(vi->i_sb, "$BITMAP attribute is compressed and/or "
- "encrypted and/or sparse.");
- goto iput_unm_err_out;
- }
- /* Consistency check bitmap size vs. index allocation size. */
- bvi_size = i_size_read(bvi);
- if ((bvi_size << 3) < (vi->i_size >> ni->itype.index.block_size_bits)) {
- ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) for "
- "index allocation (0x%llx).", bvi_size << 3,
- vi->i_size);
- goto iput_unm_err_out;
- }
- iput(bvi);
-skip_large_index_stuff:
- /* Setup the operations for this index inode. */
- vi->i_mapping->a_ops = &ntfs_mst_aops;
- vi->i_blocks = ni->allocated_size >> 9;
- /*
- * Make sure the base inode doesn't go away and attach it to the
- * index inode.
- */
- igrab(base_vi);
- ni->ext.base_ntfs_ino = base_ni;
- ni->nr_extents = -1;
-
- ntfs_debug("Done.");
- return 0;
-iput_unm_err_out:
- iput(bvi);
-unm_err_out:
- if (!err)
- err = -EIO;
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
-err_out:
- ntfs_error(vi->i_sb, "Failed with error code %i while reading index "
- "inode (mft_no 0x%lx, name_len %i.", err, vi->i_ino,
- ni->name_len);
- make_bad_inode(vi);
- if (err != -EOPNOTSUPP && err != -ENOMEM)
- NVolSetErrors(vol);
- return err;
-}
-
-/*
- * The MFT inode has special locking, so teach the lock validator
- * about this by splitting off the locking rules of the MFT from
- * the locking rules of other inodes. The MFT inode can never be
- * accessed from the VFS side (or even internally), only by the
- * map_mft functions.
- */
-static struct lock_class_key mft_ni_runlist_lock_key, mft_ni_mrec_lock_key;
-
-/**
- * ntfs_read_inode_mount - special read_inode for mount time use only
- * @vi: inode to read
- *
- * Read inode FILE_MFT at mount time, only called with super_block lock
- * held from within the read_super() code path.
- *
- * This function exists because when it is called the page cache for $MFT/$DATA
- * is not initialized and hence we cannot get at the contents of mft records
- * by calling map_mft_record*().
- *
- * Further it needs to cope with the circular references problem, i.e. cannot
- * load any attributes other than $ATTRIBUTE_LIST until $DATA is loaded, because
- * we do not know where the other extent mft records are yet and again, because
- * we cannot call map_mft_record*() yet. Obviously this applies only when an
- * attribute list is actually present in $MFT inode.
- *
- * We solve these problems by starting with the $DATA attribute before anything
- * else and iterating using ntfs_attr_lookup($DATA) over all extents. As each
- * extent is found, we ntfs_mapping_pairs_decompress() including the implied
- * ntfs_runlists_merge(). Each step of the iteration necessarily provides
- * sufficient information for the next step to complete.
- *
- * This should work but there are two possible pit falls (see inline comments
- * below), but only time will tell if they are real pits or just smoke...
- */
-int ntfs_read_inode_mount(struct inode *vi)
-{
- VCN next_vcn, last_vcn, highest_vcn;
- s64 block;
- struct super_block *sb = vi->i_sb;
- ntfs_volume *vol = NTFS_SB(sb);
- struct buffer_head *bh;
- ntfs_inode *ni;
- MFT_RECORD *m = NULL;
- ATTR_RECORD *a;
- ntfs_attr_search_ctx *ctx;
- unsigned int i, nr_blocks;
- int err;
-
- ntfs_debug("Entering.");
-
- /* Initialize the ntfs specific part of @vi. */
- ntfs_init_big_inode(vi);
-
- ni = NTFS_I(vi);
-
- /* Setup the data attribute. It is special as it is mst protected. */
- NInoSetNonResident(ni);
- NInoSetMstProtected(ni);
- NInoSetSparseDisabled(ni);
- ni->type = AT_DATA;
- ni->name = NULL;
- ni->name_len = 0;
- /*
- * This sets up our little cheat allowing us to reuse the async read io
- * completion handler for directories.
- */
- ni->itype.index.block_size = vol->mft_record_size;
- ni->itype.index.block_size_bits = vol->mft_record_size_bits;
-
- /* Very important! Needed to be able to call map_mft_record*(). */
- vol->mft_ino = vi;
-
- /* Allocate enough memory to read the first mft record. */
- if (vol->mft_record_size > 64 * 1024) {
- ntfs_error(sb, "Unsupported mft record size %i (max 64kiB).",
- vol->mft_record_size);
- goto err_out;
- }
- i = vol->mft_record_size;
- if (i < sb->s_blocksize)
- i = sb->s_blocksize;
- m = (MFT_RECORD*)ntfs_malloc_nofs(i);
- if (!m) {
- ntfs_error(sb, "Failed to allocate buffer for $MFT record 0.");
- goto err_out;
- }
-
- /* Determine the first block of the $MFT/$DATA attribute. */
- block = vol->mft_lcn << vol->cluster_size_bits >>
- sb->s_blocksize_bits;
- nr_blocks = vol->mft_record_size >> sb->s_blocksize_bits;
- if (!nr_blocks)
- nr_blocks = 1;
-
- /* Load $MFT/$DATA's first mft record. */
- for (i = 0; i < nr_blocks; i++) {
- bh = sb_bread(sb, block++);
- if (!bh) {
- ntfs_error(sb, "Device read failed.");
- goto err_out;
- }
- memcpy((char*)m + (i << sb->s_blocksize_bits), bh->b_data,
- sb->s_blocksize);
- brelse(bh);
- }
-
- if (le32_to_cpu(m->bytes_allocated) != vol->mft_record_size) {
- ntfs_error(sb, "Incorrect mft record size %u in superblock, should be %u.",
- le32_to_cpu(m->bytes_allocated), vol->mft_record_size);
- goto err_out;
- }
-
- /* Apply the mst fixups. */
- if (post_read_mst_fixup((NTFS_RECORD*)m, vol->mft_record_size)) {
- /* FIXME: Try to use the $MFTMirr now. */
- ntfs_error(sb, "MST fixup failed. $MFT is corrupt.");
- goto err_out;
- }
-
- /* Sanity check offset to the first attribute */
- if (le16_to_cpu(m->attrs_offset) >= le32_to_cpu(m->bytes_allocated)) {
- ntfs_error(sb, "Incorrect mft offset to the first attribute %u in superblock.",
- le16_to_cpu(m->attrs_offset));
- goto err_out;
- }
-
- /* Need this to sanity check attribute list references to $MFT. */
- vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
-
- /* Provides read_folio() for map_mft_record(). */
- vi->i_mapping->a_ops = &ntfs_mst_aops;
-
- ctx = ntfs_attr_get_search_ctx(ni, m);
- if (!ctx) {
- err = -ENOMEM;
- goto err_out;
- }
-
- /* Find the attribute list attribute if present. */
- err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
- if (err) {
- if (unlikely(err != -ENOENT)) {
- ntfs_error(sb, "Failed to lookup attribute list "
- "attribute. You should run chkdsk.");
- goto put_err_out;
- }
- } else /* if (!err) */ {
- ATTR_LIST_ENTRY *al_entry, *next_al_entry;
- u8 *al_end;
- static const char *es = " Not allowed. $MFT is corrupt. "
- "You should run chkdsk.";
-
- ntfs_debug("Attribute list attribute found in $MFT.");
- NInoSetAttrList(ni);
- a = ctx->attr;
- if (a->flags & ATTR_COMPRESSION_MASK) {
- ntfs_error(sb, "Attribute list attribute is "
- "compressed.%s", es);
- goto put_err_out;
- }
- if (a->flags & ATTR_IS_ENCRYPTED ||
- a->flags & ATTR_IS_SPARSE) {
- if (a->non_resident) {
- ntfs_error(sb, "Non-resident attribute list "
- "attribute is encrypted/"
- "sparse.%s", es);
- goto put_err_out;
- }
- ntfs_warning(sb, "Resident attribute list attribute "
- "in $MFT system file is marked "
- "encrypted/sparse which is not true. "
- "However, Windows allows this and "
- "chkdsk does not detect or correct it "
- "so we will just ignore the invalid "
- "flags and pretend they are not set.");
- }
- /* Now allocate memory for the attribute list. */
- ni->attr_list_size = (u32)ntfs_attr_size(a);
- if (!ni->attr_list_size) {
- ntfs_error(sb, "Attr_list_size is zero");
- goto put_err_out;
- }
- ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
- if (!ni->attr_list) {
- ntfs_error(sb, "Not enough memory to allocate buffer "
- "for attribute list.");
- goto put_err_out;
- }
- if (a->non_resident) {
- NInoSetAttrListNonResident(ni);
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(sb, "Attribute list has non zero "
- "lowest_vcn. $MFT is corrupt. "
- "You should run chkdsk.");
- goto put_err_out;
- }
- /* Setup the runlist. */
- ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
- a, NULL);
- if (IS_ERR(ni->attr_list_rl.rl)) {
- err = PTR_ERR(ni->attr_list_rl.rl);
- ni->attr_list_rl.rl = NULL;
- ntfs_error(sb, "Mapping pairs decompression "
- "failed with error code %i.",
- -err);
- goto put_err_out;
- }
- /* Now load the attribute list. */
- if ((err = load_attribute_list(vol, &ni->attr_list_rl,
- ni->attr_list, ni->attr_list_size,
- sle64_to_cpu(a->data.
- non_resident.initialized_size)))) {
- ntfs_error(sb, "Failed to load attribute list "
- "attribute with error code %i.",
- -err);
- goto put_err_out;
- }
- } else /* if (!ctx.attr->non_resident) */ {
- if ((u8*)a + le16_to_cpu(
- a->data.resident.value_offset) +
- le32_to_cpu(
- a->data.resident.value_length) >
- (u8*)ctx->mrec + vol->mft_record_size) {
- ntfs_error(sb, "Corrupt attribute list "
- "attribute.");
- goto put_err_out;
- }
- /* Now copy the attribute list. */
- memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
- a->data.resident.value_offset),
- le32_to_cpu(
- a->data.resident.value_length));
- }
- /* The attribute list is now setup in memory. */
- /*
- * FIXME: I don't know if this case is actually possible.
- * According to logic it is not possible but I have seen too
- * many weird things in MS software to rely on logic... Thus we
- * perform a manual search and make sure the first $MFT/$DATA
- * extent is in the base inode. If it is not we abort with an
- * error and if we ever see a report of this error we will need
- * to do some magic in order to have the necessary mft record
- * loaded and in the right place in the page cache. But
- * hopefully logic will prevail and this never happens...
- */
- al_entry = (ATTR_LIST_ENTRY*)ni->attr_list;
- al_end = (u8*)al_entry + ni->attr_list_size;
- for (;; al_entry = next_al_entry) {
- /* Out of bounds check. */
- if ((u8*)al_entry < ni->attr_list ||
- (u8*)al_entry > al_end)
- goto em_put_err_out;
- /* Catch the end of the attribute list. */
- if ((u8*)al_entry == al_end)
- goto em_put_err_out;
- if (!al_entry->length)
- goto em_put_err_out;
- if ((u8*)al_entry + 6 > al_end || (u8*)al_entry +
- le16_to_cpu(al_entry->length) > al_end)
- goto em_put_err_out;
- next_al_entry = (ATTR_LIST_ENTRY*)((u8*)al_entry +
- le16_to_cpu(al_entry->length));
- if (le32_to_cpu(al_entry->type) > le32_to_cpu(AT_DATA))
- goto em_put_err_out;
- if (AT_DATA != al_entry->type)
- continue;
- /* We want an unnamed attribute. */
- if (al_entry->name_length)
- goto em_put_err_out;
- /* Want the first entry, i.e. lowest_vcn == 0. */
- if (al_entry->lowest_vcn)
- goto em_put_err_out;
- /* First entry has to be in the base mft record. */
- if (MREF_LE(al_entry->mft_reference) != vi->i_ino) {
- /* MFT references do not match, logic fails. */
- ntfs_error(sb, "BUG: The first $DATA extent "
- "of $MFT is not in the base "
- "mft record. Please report "
- "you saw this message to "
- "linux-ntfs-dev@lists."
- "sourceforge.net");
- goto put_err_out;
- } else {
- /* Sequence numbers must match. */
- if (MSEQNO_LE(al_entry->mft_reference) !=
- ni->seq_no)
- goto em_put_err_out;
- /* Got it. All is ok. We can stop now. */
- break;
- }
- }
- }
-
- ntfs_attr_reinit_search_ctx(ctx);
-
- /* Now load all attribute extents. */
- a = NULL;
- next_vcn = last_vcn = highest_vcn = 0;
- while (!(err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, next_vcn, NULL, 0,
- ctx))) {
- runlist_element *nrl;
-
- /* Cache the current attribute. */
- a = ctx->attr;
- /* $MFT must be non-resident. */
- if (!a->non_resident) {
- ntfs_error(sb, "$MFT must be non-resident but a "
- "resident extent was found. $MFT is "
- "corrupt. Run chkdsk.");
- goto put_err_out;
- }
- /* $MFT must be uncompressed and unencrypted. */
- if (a->flags & ATTR_COMPRESSION_MASK ||
- a->flags & ATTR_IS_ENCRYPTED ||
- a->flags & ATTR_IS_SPARSE) {
- ntfs_error(sb, "$MFT must be uncompressed, "
- "non-sparse, and unencrypted but a "
- "compressed/sparse/encrypted extent "
- "was found. $MFT is corrupt. Run "
- "chkdsk.");
- goto put_err_out;
- }
- /*
- * Decompress the mapping pairs array of this extent and merge
- * the result into the existing runlist. No need for locking
- * as we have exclusive access to the inode at this time and we
- * are a mount in progress task, too.
- */
- nrl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl);
- if (IS_ERR(nrl)) {
- ntfs_error(sb, "ntfs_mapping_pairs_decompress() "
- "failed with error code %ld. $MFT is "
- "corrupt.", PTR_ERR(nrl));
- goto put_err_out;
- }
- ni->runlist.rl = nrl;
-
- /* Are we in the first extent? */
- if (!next_vcn) {
- if (a->data.non_resident.lowest_vcn) {
- ntfs_error(sb, "First extent of $DATA "
- "attribute has non zero "
- "lowest_vcn. $MFT is corrupt. "
- "You should run chkdsk.");
- goto put_err_out;
- }
- /* Get the last vcn in the $DATA attribute. */
- last_vcn = sle64_to_cpu(
- a->data.non_resident.allocated_size)
- >> vol->cluster_size_bits;
- /* Fill in the inode size. */
- vi->i_size = sle64_to_cpu(
- a->data.non_resident.data_size);
- ni->initialized_size = sle64_to_cpu(
- a->data.non_resident.initialized_size);
- ni->allocated_size = sle64_to_cpu(
- a->data.non_resident.allocated_size);
- /*
- * Verify the number of mft records does not exceed
- * 2^32 - 1.
- */
- if ((vi->i_size >> vol->mft_record_size_bits) >=
- (1ULL << 32)) {
- ntfs_error(sb, "$MFT is too big! Aborting.");
- goto put_err_out;
- }
- /*
- * We have got the first extent of the runlist for
- * $MFT which means it is now relatively safe to call
- * the normal ntfs_read_inode() function.
- * Complete reading the inode, this will actually
- * re-read the mft record for $MFT, this time entering
- * it into the page cache with which we complete the
- * kick start of the volume. It should be safe to do
- * this now as the first extent of $MFT/$DATA is
- * already known and we would hope that we don't need
- * further extents in order to find the other
- * attributes belonging to $MFT. Only time will tell if
- * this is really the case. If not we will have to play
- * magic at this point, possibly duplicating a lot of
- * ntfs_read_inode() at this point. We will need to
- * ensure we do enough of its work to be able to call
- * ntfs_read_inode() on extents of $MFT/$DATA. But lets
- * hope this never happens...
- */
- ntfs_read_locked_inode(vi);
- if (is_bad_inode(vi)) {
- ntfs_error(sb, "ntfs_read_inode() of $MFT "
- "failed. BUG or corrupt $MFT. "
- "Run chkdsk and if no errors "
- "are found, please report you "
- "saw this message to "
- "linux-ntfs-dev@lists."
- "sourceforge.net");
- ntfs_attr_put_search_ctx(ctx);
- /* Revert to the safe super operations. */
- ntfs_free(m);
- return -1;
- }
- /*
- * Re-initialize some specifics about $MFT's inode as
- * ntfs_read_inode() will have set up the default ones.
- */
- /* Set uid and gid to root. */
- vi->i_uid = GLOBAL_ROOT_UID;
- vi->i_gid = GLOBAL_ROOT_GID;
- /* Regular file. No access for anyone. */
- vi->i_mode = S_IFREG;
- /* No VFS initiated operations allowed for $MFT. */
- vi->i_op = &ntfs_empty_inode_ops;
- vi->i_fop = &ntfs_empty_file_ops;
- }
-
- /* Get the lowest vcn for the next extent. */
- highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
- next_vcn = highest_vcn + 1;
-
- /* Only one extent or error, which we catch below. */
- if (next_vcn <= 0)
- break;
-
- /* Avoid endless loops due to corruption. */
- if (next_vcn < sle64_to_cpu(
- a->data.non_resident.lowest_vcn)) {
- ntfs_error(sb, "$MFT has corrupt attribute list "
- "attribute. Run chkdsk.");
- goto put_err_out;
- }
- }
- if (err != -ENOENT) {
- ntfs_error(sb, "Failed to lookup $MFT/$DATA attribute extent. "
- "$MFT is corrupt. Run chkdsk.");
- goto put_err_out;
- }
- if (!a) {
- ntfs_error(sb, "$MFT/$DATA attribute not found. $MFT is "
- "corrupt. Run chkdsk.");
- goto put_err_out;
- }
- if (highest_vcn && highest_vcn != last_vcn - 1) {
- ntfs_error(sb, "Failed to load the complete runlist for "
- "$MFT/$DATA. Driver bug or corrupt $MFT. "
- "Run chkdsk.");
- ntfs_debug("highest_vcn = 0x%llx, last_vcn - 1 = 0x%llx",
- (unsigned long long)highest_vcn,
- (unsigned long long)last_vcn - 1);
- goto put_err_out;
- }
- ntfs_attr_put_search_ctx(ctx);
- ntfs_debug("Done.");
- ntfs_free(m);
-
- /*
- * Split the locking rules of the MFT inode from the
- * locking rules of other inodes:
- */
- lockdep_set_class(&ni->runlist.lock, &mft_ni_runlist_lock_key);
- lockdep_set_class(&ni->mrec_lock, &mft_ni_mrec_lock_key);
-
- return 0;
-
-em_put_err_out:
- ntfs_error(sb, "Couldn't find first extent of $DATA attribute in "
- "attribute list. $MFT is corrupt. Run chkdsk.");
-put_err_out:
- ntfs_attr_put_search_ctx(ctx);
-err_out:
- ntfs_error(sb, "Failed. Marking inode as bad.");
- make_bad_inode(vi);
- ntfs_free(m);
- return -1;
-}
-
-static void __ntfs_clear_inode(ntfs_inode *ni)
-{
- /* Free all alocated memory. */
- down_write(&ni->runlist.lock);
- if (ni->runlist.rl) {
- ntfs_free(ni->runlist.rl);
- ni->runlist.rl = NULL;
- }
- up_write(&ni->runlist.lock);
-
- if (ni->attr_list) {
- ntfs_free(ni->attr_list);
- ni->attr_list = NULL;
- }
-
- down_write(&ni->attr_list_rl.lock);
- if (ni->attr_list_rl.rl) {
- ntfs_free(ni->attr_list_rl.rl);
- ni->attr_list_rl.rl = NULL;
- }
- up_write(&ni->attr_list_rl.lock);
-
- if (ni->name_len && ni->name != I30) {
- /* Catch bugs... */
- BUG_ON(!ni->name);
- kfree(ni->name);
- }
-}
-
-void ntfs_clear_extent_inode(ntfs_inode *ni)
-{
- ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
-
- BUG_ON(NInoAttr(ni));
- BUG_ON(ni->nr_extents != -1);
-
-#ifdef NTFS_RW
- if (NInoDirty(ni)) {
- if (!is_bad_inode(VFS_I(ni->ext.base_ntfs_ino)))
- ntfs_error(ni->vol->sb, "Clearing dirty extent inode! "
- "Losing data! This is a BUG!!!");
- // FIXME: Do something!!!
- }
-#endif /* NTFS_RW */
-
- __ntfs_clear_inode(ni);
-
- /* Bye, bye... */
- ntfs_destroy_extent_inode(ni);
-}
-
-/**
- * ntfs_evict_big_inode - clean up the ntfs specific part of an inode
- * @vi: vfs inode pending annihilation
- *
- * When the VFS is going to remove an inode from memory, ntfs_clear_big_inode()
- * is called, which deallocates all memory belonging to the NTFS specific part
- * of the inode and returns.
- *
- * If the MFT record is dirty, we commit it before doing anything else.
- */
-void ntfs_evict_big_inode(struct inode *vi)
-{
- ntfs_inode *ni = NTFS_I(vi);
-
- truncate_inode_pages_final(&vi->i_data);
- clear_inode(vi);
-
-#ifdef NTFS_RW
- if (NInoDirty(ni)) {
- bool was_bad = (is_bad_inode(vi));
-
- /* Committing the inode also commits all extent inodes. */
- ntfs_commit_inode(vi);
-
- if (!was_bad && (is_bad_inode(vi) || NInoDirty(ni))) {
- ntfs_error(vi->i_sb, "Failed to commit dirty inode "
- "0x%lx. Losing data!", vi->i_ino);
- // FIXME: Do something!!!
- }
- }
-#endif /* NTFS_RW */
-
- /* No need to lock at this stage as no one else has a reference. */
- if (ni->nr_extents > 0) {
- int i;
-
- for (i = 0; i < ni->nr_extents; i++)
- ntfs_clear_extent_inode(ni->ext.extent_ntfs_inos[i]);
- kfree(ni->ext.extent_ntfs_inos);
- }
-
- __ntfs_clear_inode(ni);
-
- if (NInoAttr(ni)) {
- /* Release the base inode if we are holding it. */
- if (ni->nr_extents == -1) {
- iput(VFS_I(ni->ext.base_ntfs_ino));
- ni->nr_extents = 0;
- ni->ext.base_ntfs_ino = NULL;
- }
- }
- BUG_ON(ni->page);
- if (!atomic_dec_and_test(&ni->count))
- BUG();
- return;
-}
-
-/**
- * ntfs_show_options - show mount options in /proc/mounts
- * @sf: seq_file in which to write our mount options
- * @root: root of the mounted tree whose mount options to display
- *
- * Called by the VFS once for each mounted ntfs volume when someone reads
- * /proc/mounts in order to display the NTFS specific mount options of each
- * mount. The mount options of fs specified by @root are written to the seq file
- * @sf and success is returned.
- */
-int ntfs_show_options(struct seq_file *sf, struct dentry *root)
-{
- ntfs_volume *vol = NTFS_SB(root->d_sb);
- int i;
-
- seq_printf(sf, ",uid=%i", from_kuid_munged(&init_user_ns, vol->uid));
- seq_printf(sf, ",gid=%i", from_kgid_munged(&init_user_ns, vol->gid));
- if (vol->fmask == vol->dmask)
- seq_printf(sf, ",umask=0%o", vol->fmask);
- else {
- seq_printf(sf, ",fmask=0%o", vol->fmask);
- seq_printf(sf, ",dmask=0%o", vol->dmask);
- }
- seq_printf(sf, ",nls=%s", vol->nls_map->charset);
- if (NVolCaseSensitive(vol))
- seq_printf(sf, ",case_sensitive");
- if (NVolShowSystemFiles(vol))
- seq_printf(sf, ",show_sys_files");
- if (!NVolSparseEnabled(vol))
- seq_printf(sf, ",disable_sparse");
- for (i = 0; on_errors_arr[i].val; i++) {
- if (on_errors_arr[i].val & vol->on_errors)
- seq_printf(sf, ",errors=%s", on_errors_arr[i].str);
- }
- seq_printf(sf, ",mft_zone_multiplier=%i", vol->mft_zone_multiplier);
- return 0;
-}
-
-#ifdef NTFS_RW
-
-static const char *es = " Leaving inconsistent metadata. Unmount and run "
- "chkdsk.";
-
-/**
- * ntfs_truncate - called when the i_size of an ntfs inode is changed
- * @vi: inode for which the i_size was changed
- *
- * We only support i_size changes for normal files at present, i.e. not
- * compressed and not encrypted. This is enforced in ntfs_setattr(), see
- * below.
- *
- * The kernel guarantees that @vi is a regular file (S_ISREG() is true) and
- * that the change is allowed.
- *
- * This implies for us that @vi is a file inode rather than a directory, index,
- * or attribute inode as well as that @vi is a base inode.
- *
- * Returns 0 on success or -errno on error.
- *
- * Called with ->i_mutex held.
- */
-int ntfs_truncate(struct inode *vi)
-{
- s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size;
- VCN highest_vcn;
- unsigned long flags;
- ntfs_inode *base_ni, *ni = NTFS_I(vi);
- ntfs_volume *vol = ni->vol;
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- const char *te = " Leaving file length out of sync with i_size.";
- int err, mp_size, size_change, alloc_change;
-
- ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
- BUG_ON(NInoAttr(ni));
- BUG_ON(S_ISDIR(vi->i_mode));
- BUG_ON(NInoMstProtected(ni));
- BUG_ON(ni->nr_extents < 0);
-retry_truncate:
- /*
- * Lock the runlist for writing and map the mft record to ensure it is
- * safe to mess with the attribute runlist and sizes.
- */
- down_write(&ni->runlist.lock);
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx "
- "(error code %d).%s", vi->i_ino, err, te);
- ctx = NULL;
- m = NULL;
- goto old_bad_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- ntfs_error(vi->i_sb, "Failed to allocate a search context for "
- "inode 0x%lx (not enough memory).%s",
- vi->i_ino, te);
- err = -ENOMEM;
- goto old_bad_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT) {
- ntfs_error(vi->i_sb, "Open attribute is missing from "
- "mft record. Inode 0x%lx is corrupt. "
- "Run chkdsk.%s", vi->i_ino, te);
- err = -EIO;
- } else
- ntfs_error(vi->i_sb, "Failed to lookup attribute in "
- "inode 0x%lx (error code %d).%s",
- vi->i_ino, err, te);
- goto old_bad_out;
- }
- m = ctx->mrec;
- a = ctx->attr;
- /*
- * The i_size of the vfs inode is the new size for the attribute value.
- */
- new_size = i_size_read(vi);
- /* The current size of the attribute value is the old size. */
- old_size = ntfs_attr_size(a);
- /* Calculate the new allocated size. */
- if (NInoNonResident(ni))
- new_alloc_size = (new_size + vol->cluster_size - 1) &
- ~(s64)vol->cluster_size_mask;
- else
- new_alloc_size = (new_size + 7) & ~7;
- /* The current allocated size is the old allocated size. */
- read_lock_irqsave(&ni->size_lock, flags);
- old_alloc_size = ni->allocated_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- /*
- * The change in the file size. This will be 0 if no change, >0 if the
- * size is growing, and <0 if the size is shrinking.
- */
- size_change = -1;
- if (new_size - old_size >= 0) {
- size_change = 1;
- if (new_size == old_size)
- size_change = 0;
- }
- /* As above for the allocated size. */
- alloc_change = -1;
- if (new_alloc_size - old_alloc_size >= 0) {
- alloc_change = 1;
- if (new_alloc_size == old_alloc_size)
- alloc_change = 0;
- }
- /*
- * If neither the size nor the allocation are being changed there is
- * nothing to do.
- */
- if (!size_change && !alloc_change)
- goto unm_done;
- /* If the size is changing, check if new size is allowed in $AttrDef. */
- if (size_change) {
- err = ntfs_attr_size_bounds_check(vol, ni->type, new_size);
- if (unlikely(err)) {
- if (err == -ERANGE) {
- ntfs_error(vol->sb, "Truncate would cause the "
- "inode 0x%lx to %simum size "
- "for its attribute type "
- "(0x%x). Aborting truncate.",
- vi->i_ino,
- new_size > old_size ? "exceed "
- "the max" : "go under the min",
- le32_to_cpu(ni->type));
- err = -EFBIG;
- } else {
- ntfs_error(vol->sb, "Inode 0x%lx has unknown "
- "attribute type 0x%x. "
- "Aborting truncate.",
- vi->i_ino,
- le32_to_cpu(ni->type));
- err = -EIO;
- }
- /* Reset the vfs inode size to the old size. */
- i_size_write(vi, old_size);
- goto err_out;
- }
- }
- if (NInoCompressed(ni) || NInoEncrypted(ni)) {
- ntfs_warning(vi->i_sb, "Changes in inode size are not "
- "supported yet for %s files, ignoring.",
- NInoCompressed(ni) ? "compressed" :
- "encrypted");
- err = -EOPNOTSUPP;
- goto bad_out;
- }
- if (a->non_resident)
- goto do_non_resident_truncate;
- BUG_ON(NInoNonResident(ni));
- /* Resize the attribute record to best fit the new attribute size. */
- if (new_size < vol->mft_record_size &&
- !ntfs_resident_attr_value_resize(m, a, new_size)) {
- /* The resize succeeded! */
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- write_lock_irqsave(&ni->size_lock, flags);
- /* Update the sizes in the ntfs inode and all is done. */
- ni->allocated_size = le32_to_cpu(a->length) -
- le16_to_cpu(a->data.resident.value_offset);
- /*
- * Note ntfs_resident_attr_value_resize() has already done any
- * necessary data clearing in the attribute record. When the
- * file is being shrunk vmtruncate() will already have cleared
- * the top part of the last partial page, i.e. since this is
- * the resident case this is the page with index 0. However,
- * when the file is being expanded, the page cache page data
- * between the old data_size, i.e. old_size, and the new_size
- * has not been zeroed. Fortunately, we do not need to zero it
- * either since on one hand it will either already be zero due
- * to both read_folio and writepage clearing partial page data
- * beyond i_size in which case there is nothing to do or in the
- * case of the file being mmap()ped at the same time, POSIX
- * specifies that the behaviour is unspecified thus we do not
- * have to do anything. This means that in our implementation
- * in the rare case that the file is mmap()ped and a write
- * occurred into the mmap()ped region just beyond the file size
- * and writepage has not yet been called to write out the page
- * (which would clear the area beyond the file size) and we now
- * extend the file size to incorporate this dirty region
- * outside the file size, a write of the page would result in
- * this data being written to disk instead of being cleared.
- * Given both POSIX and the Linux mmap(2) man page specify that
- * this corner case is undefined, we choose to leave it like
- * that as this is much simpler for us as we cannot lock the
- * relevant page now since we are holding too many ntfs locks
- * which would result in a lock reversal deadlock.
- */
- ni->initialized_size = new_size;
- write_unlock_irqrestore(&ni->size_lock, flags);
- goto unm_done;
- }
- /* If the above resize failed, this must be an attribute extension. */
- BUG_ON(size_change < 0);
- /*
- * We have to drop all the locks so we can call
- * ntfs_attr_make_non_resident(). This could be optimised by try-
- * locking the first page cache page and only if that fails dropping
- * the locks, locking the page, and redoing all the locking and
- * lookups. While this would be a huge optimisation, it is not worth
- * it as this is definitely a slow code path as it only ever can happen
- * once for any given file.
- */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- up_write(&ni->runlist.lock);
- /*
- * Not enough space in the mft record, try to make the attribute
- * non-resident and if successful restart the truncation process.
- */
- err = ntfs_attr_make_non_resident(ni, old_size);
- if (likely(!err))
- goto retry_truncate;
- /*
- * Could not make non-resident. If this is due to this not being
- * permitted for this attribute type or there not being enough space,
- * try to make other attributes non-resident. Otherwise fail.
- */
- if (unlikely(err != -EPERM && err != -ENOSPC)) {
- ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute "
- "type 0x%x, because the conversion from "
- "resident to non-resident attribute failed "
- "with error code %i.", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type), err);
- if (err != -ENOMEM)
- err = -EIO;
- goto conv_err_out;
- }
- /* TODO: Not implemented from here, abort. */
- if (err == -ENOSPC)
- ntfs_error(vol->sb, "Not enough space in the mft record/on "
- "disk for the non-resident attribute value. "
- "This case is not implemented yet.");
- else /* if (err == -EPERM) */
- ntfs_error(vol->sb, "This attribute type may not be "
- "non-resident. This case is not implemented "
- "yet.");
- err = -EOPNOTSUPP;
- goto conv_err_out;
-#if 0
- // TODO: Attempt to make other attributes non-resident.
- if (!err)
- goto do_resident_extend;
- /*
- * Both the attribute list attribute and the standard information
- * attribute must remain in the base inode. Thus, if this is one of
- * these attributes, we have to try to move other attributes out into
- * extent mft records instead.
- */
- if (ni->type == AT_ATTRIBUTE_LIST ||
- ni->type == AT_STANDARD_INFORMATION) {
- // TODO: Attempt to move other attributes into extent mft
- // records.
- err = -EOPNOTSUPP;
- if (!err)
- goto do_resident_extend;
- goto err_out;
- }
- // TODO: Attempt to move this attribute to an extent mft record, but
- // only if it is not already the only attribute in an mft record in
- // which case there would be nothing to gain.
- err = -EOPNOTSUPP;
- if (!err)
- goto do_resident_extend;
- /* There is nothing we can do to make enough space. )-: */
- goto err_out;
-#endif
-do_non_resident_truncate:
- BUG_ON(!NInoNonResident(ni));
- if (alloc_change < 0) {
- highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
- if (highest_vcn > 0 &&
- old_alloc_size >> vol->cluster_size_bits >
- highest_vcn + 1) {
- /*
- * This attribute has multiple extents. Not yet
- * supported.
- */
- ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, "
- "attribute type 0x%x, because the "
- "attribute is highly fragmented (it "
- "consists of multiple extents) and "
- "this case is not implemented yet.",
- vi->i_ino,
- (unsigned)le32_to_cpu(ni->type));
- err = -EOPNOTSUPP;
- goto bad_out;
- }
- }
- /*
- * If the size is shrinking, need to reduce the initialized_size and
- * the data_size before reducing the allocation.
- */
- if (size_change < 0) {
- /*
- * Make the valid size smaller (i_size is already up-to-date).
- */
- write_lock_irqsave(&ni->size_lock, flags);
- if (new_size < ni->initialized_size) {
- ni->initialized_size = new_size;
- a->data.non_resident.initialized_size =
- cpu_to_sle64(new_size);
- }
- a->data.non_resident.data_size = cpu_to_sle64(new_size);
- write_unlock_irqrestore(&ni->size_lock, flags);
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- /* If the allocated size is not changing, we are done. */
- if (!alloc_change)
- goto unm_done;
- /*
- * If the size is shrinking it makes no sense for the
- * allocation to be growing.
- */
- BUG_ON(alloc_change > 0);
- } else /* if (size_change >= 0) */ {
- /*
- * The file size is growing or staying the same but the
- * allocation can be shrinking, growing or staying the same.
- */
- if (alloc_change > 0) {
- /*
- * We need to extend the allocation and possibly update
- * the data size. If we are updating the data size,
- * since we are not touching the initialized_size we do
- * not need to worry about the actual data on disk.
- * And as far as the page cache is concerned, there
- * will be no pages beyond the old data size and any
- * partial region in the last page between the old and
- * new data size (or the end of the page if the new
- * data size is outside the page) does not need to be
- * modified as explained above for the resident
- * attribute truncate case. To do this, we simply drop
- * the locks we hold and leave all the work to our
- * friendly helper ntfs_attr_extend_allocation().
- */
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- up_write(&ni->runlist.lock);
- err = ntfs_attr_extend_allocation(ni, new_size,
- size_change > 0 ? new_size : -1, -1);
- /*
- * ntfs_attr_extend_allocation() will have done error
- * output already.
- */
- goto done;
- }
- if (!alloc_change)
- goto alloc_done;
- }
- /* alloc_change < 0 */
- /* Free the clusters. */
- nr_freed = ntfs_cluster_free(ni, new_alloc_size >>
- vol->cluster_size_bits, -1, ctx);
- m = ctx->mrec;
- a = ctx->attr;
- if (unlikely(nr_freed < 0)) {
- ntfs_error(vol->sb, "Failed to release cluster(s) (error code "
- "%lli). Unmount and run chkdsk to recover "
- "the lost cluster(s).", (long long)nr_freed);
- NVolSetErrors(vol);
- nr_freed = 0;
- }
- /* Truncate the runlist. */
- err = ntfs_rl_truncate_nolock(vol, &ni->runlist,
- new_alloc_size >> vol->cluster_size_bits);
- /*
- * If the runlist truncation failed and/or the search context is no
- * longer valid, we cannot resize the attribute record or build the
- * mapping pairs array thus we mark the inode bad so that no access to
- * the freed clusters can happen.
- */
- if (unlikely(err || IS_ERR(m))) {
- ntfs_error(vol->sb, "Failed to %s (error code %li).%s",
- IS_ERR(m) ?
- "restore attribute search context" :
- "truncate attribute runlist",
- IS_ERR(m) ? PTR_ERR(m) : err, es);
- err = -EIO;
- goto bad_out;
- }
- /* Get the size for the shrunk mapping pairs array for the runlist. */
- mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1);
- if (unlikely(mp_size <= 0)) {
- ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
- "attribute type 0x%x, because determining the "
- "size for the mapping pairs failed with error "
- "code %i.%s", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type), mp_size, es);
- err = -EIO;
- goto bad_out;
- }
- /*
- * Shrink the attribute record for the new mapping pairs array. Note,
- * this cannot fail since we are making the attribute smaller thus by
- * definition there is enough space to do so.
- */
- err = ntfs_attr_record_resize(m, a, mp_size +
- le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
- BUG_ON(err);
- /*
- * Generate the mapping pairs array directly into the attribute record.
- */
- err = ntfs_mapping_pairs_build(vol, (u8*)a +
- le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
- mp_size, ni->runlist.rl, 0, -1, NULL);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
- "attribute type 0x%x, because building the "
- "mapping pairs failed with error code %i.%s",
- vi->i_ino, (unsigned)le32_to_cpu(ni->type),
- err, es);
- err = -EIO;
- goto bad_out;
- }
- /* Update the allocated/compressed size as well as the highest vcn. */
- a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
- vol->cluster_size_bits) - 1);
- write_lock_irqsave(&ni->size_lock, flags);
- ni->allocated_size = new_alloc_size;
- a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
- if (NInoSparse(ni) || NInoCompressed(ni)) {
- if (nr_freed) {
- ni->itype.compressed.size -= nr_freed <<
- vol->cluster_size_bits;
- BUG_ON(ni->itype.compressed.size < 0);
- a->data.non_resident.compressed_size = cpu_to_sle64(
- ni->itype.compressed.size);
- vi->i_blocks = ni->itype.compressed.size >> 9;
- }
- } else
- vi->i_blocks = new_alloc_size >> 9;
- write_unlock_irqrestore(&ni->size_lock, flags);
- /*
- * We have shrunk the allocation. If this is a shrinking truncate we
- * have already dealt with the initialized_size and the data_size above
- * and we are done. If the truncate is only changing the allocation
- * and not the data_size, we are also done. If this is an extending
- * truncate, need to extend the data_size now which is ensured by the
- * fact that @size_change is positive.
- */
-alloc_done:
- /*
- * If the size is growing, need to update it now. If it is shrinking,
- * we have already updated it above (before the allocation change).
- */
- if (size_change > 0)
- a->data.non_resident.data_size = cpu_to_sle64(new_size);
- /* Ensure the modified mft record is written out. */
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
-unm_done:
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- up_write(&ni->runlist.lock);
-done:
- /* Update the mtime and ctime on the base inode. */
- /* normally ->truncate shouldn't update ctime or mtime,
- * but ntfs did before so it got a copy & paste version
- * of file_update_time. one day someone should fix this
- * for real.
- */
- if (!IS_NOCMTIME(VFS_I(base_ni)) && !IS_RDONLY(VFS_I(base_ni))) {
- struct timespec64 now = current_time(VFS_I(base_ni));
- struct timespec64 ctime = inode_get_ctime(VFS_I(base_ni));
- struct timespec64 mtime = inode_get_mtime(VFS_I(base_ni));
- int sync_it = 0;
-
- if (!timespec64_equal(&mtime, &now) ||
- !timespec64_equal(&ctime, &now))
- sync_it = 1;
- inode_set_ctime_to_ts(VFS_I(base_ni), now);
- inode_set_mtime_to_ts(VFS_I(base_ni), now);
-
- if (sync_it)
- mark_inode_dirty_sync(VFS_I(base_ni));
- }
-
- if (likely(!err)) {
- NInoClearTruncateFailed(ni);
- ntfs_debug("Done.");
- }
- return err;
-old_bad_out:
- old_size = -1;
-bad_out:
- if (err != -ENOMEM && err != -EOPNOTSUPP)
- NVolSetErrors(vol);
- if (err != -EOPNOTSUPP)
- NInoSetTruncateFailed(ni);
- else if (old_size >= 0)
- i_size_write(vi, old_size);
-err_out:
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- up_write(&ni->runlist.lock);
-out:
- ntfs_debug("Failed. Returning error code %i.", err);
- return err;
-conv_err_out:
- if (err != -ENOMEM && err != -EOPNOTSUPP)
- NVolSetErrors(vol);
- if (err != -EOPNOTSUPP)
- NInoSetTruncateFailed(ni);
- else
- i_size_write(vi, old_size);
- goto out;
-}
-
-/**
- * ntfs_truncate_vfs - wrapper for ntfs_truncate() that has no return value
- * @vi: inode for which the i_size was changed
- *
- * Wrapper for ntfs_truncate() that has no return value.
- *
- * See ntfs_truncate() description above for details.
- */
-#ifdef NTFS_RW
-void ntfs_truncate_vfs(struct inode *vi) {
- ntfs_truncate(vi);
-}
-#endif
-
-/**
- * ntfs_setattr - called from notify_change() when an attribute is being changed
- * @idmap: idmap of the mount the inode was found from
- * @dentry: dentry whose attributes to change
- * @attr: structure describing the attributes and the changes
- *
- * We have to trap VFS attempts to truncate the file described by @dentry as
- * soon as possible, because we do not implement changes in i_size yet. So we
- * abort all i_size changes here.
- *
- * We also abort all changes of user, group, and mode as we do not implement
- * the NTFS ACLs yet.
- *
- * Called with ->i_mutex held.
- */
-int ntfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
- struct iattr *attr)
-{
- struct inode *vi = d_inode(dentry);
- int err;
- unsigned int ia_valid = attr->ia_valid;
-
- err = setattr_prepare(&nop_mnt_idmap, dentry, attr);
- if (err)
- goto out;
- /* We do not support NTFS ACLs yet. */
- if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
- ntfs_warning(vi->i_sb, "Changes in user/group/mode are not "
- "supported yet, ignoring.");
- err = -EOPNOTSUPP;
- goto out;
- }
- if (ia_valid & ATTR_SIZE) {
- if (attr->ia_size != i_size_read(vi)) {
- ntfs_inode *ni = NTFS_I(vi);
- /*
- * FIXME: For now we do not support resizing of
- * compressed or encrypted files yet.
- */
- if (NInoCompressed(ni) || NInoEncrypted(ni)) {
- ntfs_warning(vi->i_sb, "Changes in inode size "
- "are not supported yet for "
- "%s files, ignoring.",
- NInoCompressed(ni) ?
- "compressed" : "encrypted");
- err = -EOPNOTSUPP;
- } else {
- truncate_setsize(vi, attr->ia_size);
- ntfs_truncate_vfs(vi);
- }
- if (err || ia_valid == ATTR_SIZE)
- goto out;
- } else {
- /*
- * We skipped the truncate but must still update
- * timestamps.
- */
- ia_valid |= ATTR_MTIME | ATTR_CTIME;
- }
- }
- if (ia_valid & ATTR_ATIME)
- inode_set_atime_to_ts(vi, attr->ia_atime);
- if (ia_valid & ATTR_MTIME)
- inode_set_mtime_to_ts(vi, attr->ia_mtime);
- if (ia_valid & ATTR_CTIME)
- inode_set_ctime_to_ts(vi, attr->ia_ctime);
- mark_inode_dirty(vi);
-out:
- return err;
-}
-
-/**
- * __ntfs_write_inode - write out a dirty inode
- * @vi: inode to write out
- * @sync: if true, write out synchronously
- *
- * Write out a dirty inode to disk including any extent inodes if present.
- *
- * If @sync is true, commit the inode to disk and wait for io completion. This
- * is done using write_mft_record().
- *
- * If @sync is false, just schedule the write to happen but do not wait for i/o
- * completion. In 2.6 kernels, scheduling usually happens just by virtue of
- * marking the page (and in this case mft record) dirty but we do not implement
- * this yet as write_mft_record() largely ignores the @sync parameter and
- * always performs synchronous writes.
- *
- * Return 0 on success and -errno on error.
- */
-int __ntfs_write_inode(struct inode *vi, int sync)
-{
- sle64 nt;
- ntfs_inode *ni = NTFS_I(vi);
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *m;
- STANDARD_INFORMATION *si;
- int err = 0;
- bool modified = false;
-
- ntfs_debug("Entering for %sinode 0x%lx.", NInoAttr(ni) ? "attr " : "",
- vi->i_ino);
- /*
- * Dirty attribute inodes are written via their real inodes so just
- * clean them here. Access time updates are taken care off when the
- * real inode is written.
- */
- if (NInoAttr(ni)) {
- NInoClearDirty(ni);
- ntfs_debug("Done.");
- return 0;
- }
- /* Map, pin, and lock the mft record belonging to the inode. */
- m = map_mft_record(ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- goto err_out;
- }
- /* Update the access times in the standard information attribute. */
- ctx = ntfs_attr_get_search_ctx(ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto unm_err_out;
- }
- err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- ntfs_attr_put_search_ctx(ctx);
- goto unm_err_out;
- }
- si = (STANDARD_INFORMATION*)((u8*)ctx->attr +
- le16_to_cpu(ctx->attr->data.resident.value_offset));
- /* Update the access times if they have changed. */
- nt = utc2ntfs(inode_get_mtime(vi));
- if (si->last_data_change_time != nt) {
- ntfs_debug("Updating mtime for inode 0x%lx: old = 0x%llx, "
- "new = 0x%llx", vi->i_ino, (long long)
- sle64_to_cpu(si->last_data_change_time),
- (long long)sle64_to_cpu(nt));
- si->last_data_change_time = nt;
- modified = true;
- }
- nt = utc2ntfs(inode_get_ctime(vi));
- if (si->last_mft_change_time != nt) {
- ntfs_debug("Updating ctime for inode 0x%lx: old = 0x%llx, "
- "new = 0x%llx", vi->i_ino, (long long)
- sle64_to_cpu(si->last_mft_change_time),
- (long long)sle64_to_cpu(nt));
- si->last_mft_change_time = nt;
- modified = true;
- }
- nt = utc2ntfs(inode_get_atime(vi));
- if (si->last_access_time != nt) {
- ntfs_debug("Updating atime for inode 0x%lx: old = 0x%llx, "
- "new = 0x%llx", vi->i_ino,
- (long long)sle64_to_cpu(si->last_access_time),
- (long long)sle64_to_cpu(nt));
- si->last_access_time = nt;
- modified = true;
- }
- /*
- * If we just modified the standard information attribute we need to
- * mark the mft record it is in dirty. We do this manually so that
- * mark_inode_dirty() is not called which would redirty the inode and
- * hence result in an infinite loop of trying to write the inode.
- * There is no need to mark the base inode nor the base mft record
- * dirty, since we are going to write this mft record below in any case
- * and the base mft record may actually not have been modified so it
- * might not need to be written out.
- * NOTE: It is not a problem when the inode for $MFT itself is being
- * written out as mark_ntfs_record_dirty() will only set I_DIRTY_PAGES
- * on the $MFT inode and hence __ntfs_write_inode() will not be
- * re-invoked because of it which in turn is ok since the dirtied mft
- * record will be cleaned and written out to disk below, i.e. before
- * this function returns.
- */
- if (modified) {
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- if (!NInoTestSetDirty(ctx->ntfs_ino))
- mark_ntfs_record_dirty(ctx->ntfs_ino->page,
- ctx->ntfs_ino->page_ofs);
- }
- ntfs_attr_put_search_ctx(ctx);
- /* Now the access times are updated, write the base mft record. */
- if (NInoDirty(ni))
- err = write_mft_record(ni, m, sync);
- /* Write all attached extent mft records. */
- mutex_lock(&ni->extent_lock);
- if (ni->nr_extents > 0) {
- ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos;
- int i;
-
- ntfs_debug("Writing %i extent inodes.", ni->nr_extents);
- for (i = 0; i < ni->nr_extents; i++) {
- ntfs_inode *tni = extent_nis[i];
-
- if (NInoDirty(tni)) {
- MFT_RECORD *tm = map_mft_record(tni);
- int ret;
-
- if (IS_ERR(tm)) {
- if (!err || err == -ENOMEM)
- err = PTR_ERR(tm);
- continue;
- }
- ret = write_mft_record(tni, tm, sync);
- unmap_mft_record(tni);
- if (unlikely(ret)) {
- if (!err || err == -ENOMEM)
- err = ret;
- }
- }
- }
- }
- mutex_unlock(&ni->extent_lock);
- unmap_mft_record(ni);
- if (unlikely(err))
- goto err_out;
- ntfs_debug("Done.");
- return 0;
-unm_err_out:
- unmap_mft_record(ni);
-err_out:
- if (err == -ENOMEM) {
- ntfs_warning(vi->i_sb, "Not enough memory to write inode. "
- "Marking the inode dirty again, so the VFS "
- "retries later.");
- mark_inode_dirty(vi);
- } else {
- ntfs_error(vi->i_sb, "Failed (error %i): Run chkdsk.", -err);
- NVolSetErrors(ni->vol);
- }
- return err;
-}
-
-#endif /* NTFS_RW */