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-rw-r--r--fs/orangefs/inode.c1141
1 files changed, 1141 insertions, 0 deletions
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
new file mode 100644
index 000000000..b3bbb5a57
--- /dev/null
+++ b/fs/orangefs/inode.c
@@ -0,0 +1,1141 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
+ *
+ * See COPYING in top-level directory.
+ */
+
+/*
+ * Linux VFS inode operations.
+ */
+
+#include <linux/blkdev.h>
+#include <linux/fileattr.h>
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+static int orangefs_writepage_locked(struct page *page,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = page->mapping->host;
+ struct orangefs_write_range *wr = NULL;
+ struct iov_iter iter;
+ struct bio_vec bv;
+ size_t len, wlen;
+ ssize_t ret;
+ loff_t off;
+
+ set_page_writeback(page);
+
+ len = i_size_read(inode);
+ if (PagePrivate(page)) {
+ wr = (struct orangefs_write_range *)page_private(page);
+ WARN_ON(wr->pos >= len);
+ off = wr->pos;
+ if (off + wr->len > len)
+ wlen = len - off;
+ else
+ wlen = wr->len;
+ } else {
+ WARN_ON(1);
+ off = page_offset(page);
+ if (off + PAGE_SIZE > len)
+ wlen = len - off;
+ else
+ wlen = PAGE_SIZE;
+ }
+ /* Should've been handled in orangefs_invalidate_folio. */
+ WARN_ON(off == len || off + wlen > len);
+
+ bv.bv_page = page;
+ bv.bv_len = wlen;
+ bv.bv_offset = off % PAGE_SIZE;
+ WARN_ON(wlen == 0);
+ iov_iter_bvec(&iter, ITER_SOURCE, &bv, 1, wlen);
+
+ ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
+ len, wr, NULL, NULL);
+ if (ret < 0) {
+ SetPageError(page);
+ mapping_set_error(page->mapping, ret);
+ } else {
+ ret = 0;
+ }
+ kfree(detach_page_private(page));
+ return ret;
+}
+
+static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
+{
+ int ret;
+ ret = orangefs_writepage_locked(page, wbc);
+ unlock_page(page);
+ end_page_writeback(page);
+ return ret;
+}
+
+struct orangefs_writepages {
+ loff_t off;
+ size_t len;
+ kuid_t uid;
+ kgid_t gid;
+ int maxpages;
+ int npages;
+ struct page **pages;
+ struct bio_vec *bv;
+};
+
+static int orangefs_writepages_work(struct orangefs_writepages *ow,
+ struct writeback_control *wbc)
+{
+ struct inode *inode = ow->pages[0]->mapping->host;
+ struct orangefs_write_range *wrp, wr;
+ struct iov_iter iter;
+ ssize_t ret;
+ size_t len;
+ loff_t off;
+ int i;
+
+ len = i_size_read(inode);
+
+ for (i = 0; i < ow->npages; i++) {
+ set_page_writeback(ow->pages[i]);
+ ow->bv[i].bv_page = ow->pages[i];
+ ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
+ ow->off + ow->len) -
+ max(ow->off, page_offset(ow->pages[i]));
+ if (i == 0)
+ ow->bv[i].bv_offset = ow->off -
+ page_offset(ow->pages[i]);
+ else
+ ow->bv[i].bv_offset = 0;
+ }
+ iov_iter_bvec(&iter, ITER_SOURCE, ow->bv, ow->npages, ow->len);
+
+ WARN_ON(ow->off >= len);
+ if (ow->off + ow->len > len)
+ ow->len = len - ow->off;
+
+ off = ow->off;
+ wr.uid = ow->uid;
+ wr.gid = ow->gid;
+ ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
+ 0, &wr, NULL, NULL);
+ if (ret < 0) {
+ for (i = 0; i < ow->npages; i++) {
+ SetPageError(ow->pages[i]);
+ mapping_set_error(ow->pages[i]->mapping, ret);
+ if (PagePrivate(ow->pages[i])) {
+ wrp = (struct orangefs_write_range *)
+ page_private(ow->pages[i]);
+ ClearPagePrivate(ow->pages[i]);
+ put_page(ow->pages[i]);
+ kfree(wrp);
+ }
+ end_page_writeback(ow->pages[i]);
+ unlock_page(ow->pages[i]);
+ }
+ } else {
+ ret = 0;
+ for (i = 0; i < ow->npages; i++) {
+ if (PagePrivate(ow->pages[i])) {
+ wrp = (struct orangefs_write_range *)
+ page_private(ow->pages[i]);
+ ClearPagePrivate(ow->pages[i]);
+ put_page(ow->pages[i]);
+ kfree(wrp);
+ }
+ end_page_writeback(ow->pages[i]);
+ unlock_page(ow->pages[i]);
+ }
+ }
+ return ret;
+}
+
+static int orangefs_writepages_callback(struct page *page,
+ struct writeback_control *wbc, void *data)
+{
+ struct orangefs_writepages *ow = data;
+ struct orangefs_write_range *wr;
+ int ret;
+
+ if (!PagePrivate(page)) {
+ unlock_page(page);
+ /* It's not private so there's nothing to write, right? */
+ printk("writepages_callback not private!\n");
+ BUG();
+ return 0;
+ }
+ wr = (struct orangefs_write_range *)page_private(page);
+
+ ret = -1;
+ if (ow->npages == 0) {
+ ow->off = wr->pos;
+ ow->len = wr->len;
+ ow->uid = wr->uid;
+ ow->gid = wr->gid;
+ ow->pages[ow->npages++] = page;
+ ret = 0;
+ goto done;
+ }
+ if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
+ orangefs_writepages_work(ow, wbc);
+ ow->npages = 0;
+ ret = -1;
+ goto done;
+ }
+ if (ow->off + ow->len == wr->pos) {
+ ow->len += wr->len;
+ ow->pages[ow->npages++] = page;
+ ret = 0;
+ goto done;
+ }
+done:
+ if (ret == -1) {
+ if (ow->npages) {
+ orangefs_writepages_work(ow, wbc);
+ ow->npages = 0;
+ }
+ ret = orangefs_writepage_locked(page, wbc);
+ mapping_set_error(page->mapping, ret);
+ unlock_page(page);
+ end_page_writeback(page);
+ } else {
+ if (ow->npages == ow->maxpages) {
+ orangefs_writepages_work(ow, wbc);
+ ow->npages = 0;
+ }
+ }
+ return ret;
+}
+
+static int orangefs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct orangefs_writepages *ow;
+ struct blk_plug plug;
+ int ret;
+ ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
+ if (!ow)
+ return -ENOMEM;
+ ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
+ ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
+ if (!ow->pages) {
+ kfree(ow);
+ return -ENOMEM;
+ }
+ ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
+ if (!ow->bv) {
+ kfree(ow->pages);
+ kfree(ow);
+ return -ENOMEM;
+ }
+ blk_start_plug(&plug);
+ ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
+ if (ow->npages)
+ ret = orangefs_writepages_work(ow, wbc);
+ blk_finish_plug(&plug);
+ kfree(ow->pages);
+ kfree(ow->bv);
+ kfree(ow);
+ return ret;
+}
+
+static int orangefs_launder_folio(struct folio *);
+
+static void orangefs_readahead(struct readahead_control *rac)
+{
+ loff_t offset;
+ struct iov_iter iter;
+ struct inode *inode = rac->mapping->host;
+ struct xarray *i_pages;
+ struct page *page;
+ loff_t new_start = readahead_pos(rac);
+ int ret;
+ size_t new_len = 0;
+
+ loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
+ loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
+
+ if (pages_remaining >= 1024)
+ new_len = 4194304;
+ else if (pages_remaining > readahead_count(rac))
+ new_len = bytes_remaining;
+
+ if (new_len)
+ readahead_expand(rac, new_start, new_len);
+
+ offset = readahead_pos(rac);
+ i_pages = &rac->mapping->i_pages;
+
+ iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
+
+ /* read in the pages. */
+ if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
+ &offset, &iter, readahead_length(rac),
+ inode->i_size, NULL, NULL, rac->file)) < 0)
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s: wait_for_direct_io failed. \n", __func__);
+ else
+ ret = 0;
+
+ /* clean up. */
+ while ((page = readahead_page(rac))) {
+ page_endio(page, false, ret);
+ put_page(page);
+ }
+}
+
+static int orangefs_read_folio(struct file *file, struct folio *folio)
+{
+ struct inode *inode = folio->mapping->host;
+ struct iov_iter iter;
+ struct bio_vec bv;
+ ssize_t ret;
+ loff_t off; /* offset of this folio in the file */
+
+ if (folio_test_dirty(folio))
+ orangefs_launder_folio(folio);
+
+ off = folio_pos(folio);
+ bv.bv_page = &folio->page;
+ bv.bv_len = folio_size(folio);
+ bv.bv_offset = 0;
+ iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
+
+ ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
+ folio_size(folio), inode->i_size, NULL, NULL, file);
+ /* this will only zero remaining unread portions of the folio data */
+ iov_iter_zero(~0U, &iter);
+ /* takes care of potential aliasing */
+ flush_dcache_folio(folio);
+ if (ret < 0) {
+ folio_set_error(folio);
+ } else {
+ folio_mark_uptodate(folio);
+ ret = 0;
+ }
+ /* unlock the folio after the ->read_folio() routine completes */
+ folio_unlock(folio);
+ return ret;
+}
+
+static int orangefs_write_begin(struct file *file,
+ struct address_space *mapping, loff_t pos, unsigned len,
+ struct page **pagep, void **fsdata)
+{
+ struct orangefs_write_range *wr;
+ struct folio *folio;
+ struct page *page;
+ pgoff_t index;
+ int ret;
+
+ index = pos >> PAGE_SHIFT;
+
+ page = grab_cache_page_write_begin(mapping, index);
+ if (!page)
+ return -ENOMEM;
+
+ *pagep = page;
+ folio = page_folio(page);
+
+ if (folio_test_dirty(folio) && !folio_test_private(folio)) {
+ /*
+ * Should be impossible. If it happens, launder the page
+ * since we don't know what's dirty. This will WARN in
+ * orangefs_writepage_locked.
+ */
+ ret = orangefs_launder_folio(folio);
+ if (ret)
+ return ret;
+ }
+ if (folio_test_private(folio)) {
+ struct orangefs_write_range *wr;
+ wr = folio_get_private(folio);
+ if (wr->pos + wr->len == pos &&
+ uid_eq(wr->uid, current_fsuid()) &&
+ gid_eq(wr->gid, current_fsgid())) {
+ wr->len += len;
+ goto okay;
+ } else {
+ ret = orangefs_launder_folio(folio);
+ if (ret)
+ return ret;
+ }
+ }
+
+ wr = kmalloc(sizeof *wr, GFP_KERNEL);
+ if (!wr)
+ return -ENOMEM;
+
+ wr->pos = pos;
+ wr->len = len;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ folio_attach_private(folio, wr);
+okay:
+ return 0;
+}
+
+static int orangefs_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
+{
+ struct inode *inode = page->mapping->host;
+ loff_t last_pos = pos + copied;
+
+ /*
+ * No need to use i_size_read() here, the i_size
+ * cannot change under us because we hold the i_mutex.
+ */
+ if (last_pos > inode->i_size)
+ i_size_write(inode, last_pos);
+
+ /* zero the stale part of the page if we did a short copy */
+ if (!PageUptodate(page)) {
+ unsigned from = pos & (PAGE_SIZE - 1);
+ if (copied < len) {
+ zero_user(page, from + copied, len - copied);
+ }
+ /* Set fully written pages uptodate. */
+ if (pos == page_offset(page) &&
+ (len == PAGE_SIZE || pos + len == inode->i_size)) {
+ zero_user_segment(page, from + copied, PAGE_SIZE);
+ SetPageUptodate(page);
+ }
+ }
+
+ set_page_dirty(page);
+ unlock_page(page);
+ put_page(page);
+
+ mark_inode_dirty_sync(file_inode(file));
+ return copied;
+}
+
+static void orangefs_invalidate_folio(struct folio *folio,
+ size_t offset, size_t length)
+{
+ struct orangefs_write_range *wr = folio_get_private(folio);
+
+ if (offset == 0 && length == PAGE_SIZE) {
+ kfree(folio_detach_private(folio));
+ return;
+ /* write range entirely within invalidate range (or equal) */
+ } else if (folio_pos(folio) + offset <= wr->pos &&
+ wr->pos + wr->len <= folio_pos(folio) + offset + length) {
+ kfree(folio_detach_private(folio));
+ /* XXX is this right? only caller in fs */
+ folio_cancel_dirty(folio);
+ return;
+ /* invalidate range chops off end of write range */
+ } else if (wr->pos < folio_pos(folio) + offset &&
+ wr->pos + wr->len <= folio_pos(folio) + offset + length &&
+ folio_pos(folio) + offset < wr->pos + wr->len) {
+ size_t x;
+ x = wr->pos + wr->len - (folio_pos(folio) + offset);
+ WARN_ON(x > wr->len);
+ wr->len -= x;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ /* invalidate range chops off beginning of write range */
+ } else if (folio_pos(folio) + offset <= wr->pos &&
+ folio_pos(folio) + offset + length < wr->pos + wr->len &&
+ wr->pos < folio_pos(folio) + offset + length) {
+ size_t x;
+ x = folio_pos(folio) + offset + length - wr->pos;
+ WARN_ON(x > wr->len);
+ wr->pos += x;
+ wr->len -= x;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ /* invalidate range entirely within write range (punch hole) */
+ } else if (wr->pos < folio_pos(folio) + offset &&
+ folio_pos(folio) + offset + length < wr->pos + wr->len) {
+ /* XXX what do we do here... should not WARN_ON */
+ WARN_ON(1);
+ /* punch hole */
+ /*
+ * should we just ignore this and write it out anyway?
+ * it hardly makes sense
+ */
+ return;
+ /* non-overlapping ranges */
+ } else {
+ /* WARN if they do overlap */
+ if (!((folio_pos(folio) + offset + length <= wr->pos) ^
+ (wr->pos + wr->len <= folio_pos(folio) + offset))) {
+ WARN_ON(1);
+ printk("invalidate range offset %llu length %zu\n",
+ folio_pos(folio) + offset, length);
+ printk("write range offset %llu length %zu\n",
+ wr->pos, wr->len);
+ }
+ return;
+ }
+
+ /*
+ * Above there are returns where wr is freed or where we WARN.
+ * Thus the following runs if wr was modified above.
+ */
+
+ orangefs_launder_folio(folio);
+}
+
+static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
+{
+ return !folio_test_private(folio);
+}
+
+static void orangefs_free_folio(struct folio *folio)
+{
+ kfree(folio_detach_private(folio));
+}
+
+static int orangefs_launder_folio(struct folio *folio)
+{
+ int r = 0;
+ struct writeback_control wbc = {
+ .sync_mode = WB_SYNC_ALL,
+ .nr_to_write = 0,
+ };
+ folio_wait_writeback(folio);
+ if (folio_clear_dirty_for_io(folio)) {
+ r = orangefs_writepage_locked(&folio->page, &wbc);
+ folio_end_writeback(folio);
+ }
+ return r;
+}
+
+static ssize_t orangefs_direct_IO(struct kiocb *iocb,
+ struct iov_iter *iter)
+{
+ /*
+ * Comment from original do_readv_writev:
+ * Common entry point for read/write/readv/writev
+ * This function will dispatch it to either the direct I/O
+ * or buffered I/O path depending on the mount options and/or
+ * augmented/extended metadata attached to the file.
+ * Note: File extended attributes override any mount options.
+ */
+ struct file *file = iocb->ki_filp;
+ loff_t pos = iocb->ki_pos;
+ enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
+ ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
+ loff_t *offset = &pos;
+ struct inode *inode = file->f_mapping->host;
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
+ size_t count = iov_iter_count(iter);
+ ssize_t total_count = 0;
+ ssize_t ret = -EINVAL;
+ int i = 0;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
+ __func__,
+ handle,
+ (int)count);
+
+ if (type == ORANGEFS_IO_WRITE) {
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): proceeding with offset : %llu, "
+ "size %d\n",
+ __func__,
+ handle,
+ llu(*offset),
+ (int)count);
+ }
+
+ if (count == 0) {
+ ret = 0;
+ goto out;
+ }
+
+ while (iov_iter_count(iter)) {
+ size_t each_count = iov_iter_count(iter);
+ size_t amt_complete;
+ i++;
+
+ /* how much to transfer in this loop iteration */
+ if (each_count > orangefs_bufmap_size_query())
+ each_count = orangefs_bufmap_size_query();
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): size of each_count(%d)\n",
+ __func__,
+ handle,
+ (int)each_count);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): BEFORE wait_for_io: offset is %d\n",
+ __func__,
+ handle,
+ (int)*offset);
+
+ ret = wait_for_direct_io(type, inode, offset, iter,
+ each_count, 0, NULL, NULL, file);
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): return from wait_for_io:%d\n",
+ __func__,
+ handle,
+ (int)ret);
+
+ if (ret < 0)
+ goto out;
+
+ *offset += ret;
+ total_count += ret;
+ amt_complete = ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): AFTER wait_for_io: offset is %d\n",
+ __func__,
+ handle,
+ (int)*offset);
+
+ /*
+ * if we got a short I/O operations,
+ * fall out and return what we got so far
+ */
+ if (amt_complete < each_count)
+ break;
+ } /*end while */
+
+out:
+ if (total_count > 0)
+ ret = total_count;
+ if (ret > 0) {
+ if (type == ORANGEFS_IO_READ) {
+ file_accessed(file);
+ } else {
+ file_update_time(file);
+ if (*offset > i_size_read(inode))
+ i_size_write(inode, *offset);
+ }
+ }
+
+ gossip_debug(GOSSIP_FILE_DEBUG,
+ "%s(%pU): Value(%d) returned.\n",
+ __func__,
+ handle,
+ (int)ret);
+
+ return ret;
+}
+
+/** ORANGEFS2 implementation of address space operations */
+static const struct address_space_operations orangefs_address_operations = {
+ .writepage = orangefs_writepage,
+ .readahead = orangefs_readahead,
+ .read_folio = orangefs_read_folio,
+ .writepages = orangefs_writepages,
+ .dirty_folio = filemap_dirty_folio,
+ .write_begin = orangefs_write_begin,
+ .write_end = orangefs_write_end,
+ .invalidate_folio = orangefs_invalidate_folio,
+ .release_folio = orangefs_release_folio,
+ .free_folio = orangefs_free_folio,
+ .launder_folio = orangefs_launder_folio,
+ .direct_IO = orangefs_direct_IO,
+};
+
+vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
+{
+ struct folio *folio = page_folio(vmf->page);
+ struct inode *inode = file_inode(vmf->vma->vm_file);
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ unsigned long *bitlock = &orangefs_inode->bitlock;
+ vm_fault_t ret;
+ struct orangefs_write_range *wr;
+
+ sb_start_pagefault(inode->i_sb);
+
+ if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
+ ret = VM_FAULT_RETRY;
+ goto out;
+ }
+
+ folio_lock(folio);
+ if (folio_test_dirty(folio) && !folio_test_private(folio)) {
+ /*
+ * Should be impossible. If it happens, launder the folio
+ * since we don't know what's dirty. This will WARN in
+ * orangefs_writepage_locked.
+ */
+ if (orangefs_launder_folio(folio)) {
+ ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+ goto out;
+ }
+ }
+ if (folio_test_private(folio)) {
+ wr = folio_get_private(folio);
+ if (uid_eq(wr->uid, current_fsuid()) &&
+ gid_eq(wr->gid, current_fsgid())) {
+ wr->pos = page_offset(vmf->page);
+ wr->len = PAGE_SIZE;
+ goto okay;
+ } else {
+ if (orangefs_launder_folio(folio)) {
+ ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+ goto out;
+ }
+ }
+ }
+ wr = kmalloc(sizeof *wr, GFP_KERNEL);
+ if (!wr) {
+ ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+ goto out;
+ }
+ wr->pos = page_offset(vmf->page);
+ wr->len = PAGE_SIZE;
+ wr->uid = current_fsuid();
+ wr->gid = current_fsgid();
+ folio_attach_private(folio, wr);
+okay:
+
+ file_update_time(vmf->vma->vm_file);
+ if (folio->mapping != inode->i_mapping) {
+ folio_unlock(folio);
+ ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
+ goto out;
+ }
+
+ /*
+ * We mark the folio dirty already here so that when freeze is in
+ * progress, we are guaranteed that writeback during freezing will
+ * see the dirty folio and writeprotect it again.
+ */
+ folio_mark_dirty(folio);
+ folio_wait_stable(folio);
+ ret = VM_FAULT_LOCKED;
+out:
+ sb_end_pagefault(inode->i_sb);
+ return ret;
+}
+
+static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ struct orangefs_kernel_op_s *new_op;
+ loff_t orig_size;
+ int ret = -EINVAL;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
+ __func__,
+ get_khandle_from_ino(inode),
+ &orangefs_inode->refn.khandle,
+ orangefs_inode->refn.fs_id,
+ iattr->ia_size);
+
+ /* Ensure that we have a up to date size, so we know if it changed. */
+ ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
+ if (ret == -ESTALE)
+ ret = -EIO;
+ if (ret) {
+ gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
+ __func__, ret);
+ return ret;
+ }
+ orig_size = i_size_read(inode);
+
+ /* This is truncate_setsize in a different order. */
+ truncate_pagecache(inode, iattr->ia_size);
+ i_size_write(inode, iattr->ia_size);
+ if (iattr->ia_size > orig_size)
+ pagecache_isize_extended(inode, orig_size, iattr->ia_size);
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
+ if (!new_op)
+ return -ENOMEM;
+
+ new_op->upcall.req.truncate.refn = orangefs_inode->refn;
+ new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
+
+ ret = service_operation(new_op,
+ __func__,
+ get_interruptible_flag(inode));
+
+ /*
+ * the truncate has no downcall members to retrieve, but
+ * the status value tells us if it went through ok or not
+ */
+ gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
+
+ op_release(new_op);
+
+ if (ret != 0)
+ return ret;
+
+ if (orig_size != i_size_read(inode))
+ iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
+
+ return ret;
+}
+
+int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
+{
+ int ret;
+
+ if (iattr->ia_valid & ATTR_MODE) {
+ if (iattr->ia_mode & (S_ISVTX)) {
+ if (is_root_handle(inode)) {
+ /*
+ * allow sticky bit to be set on root (since
+ * it shows up that way by default anyhow),
+ * but don't show it to the server
+ */
+ iattr->ia_mode -= S_ISVTX;
+ } else {
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+ if (iattr->ia_mode & (S_ISUID)) {
+ gossip_debug(GOSSIP_UTILS_DEBUG,
+ "Attempting to set setuid bit (not supported); returning EINVAL.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+ }
+
+ if (iattr->ia_valid & ATTR_SIZE) {
+ ret = orangefs_setattr_size(inode, iattr);
+ if (ret)
+ goto out;
+ }
+
+again:
+ spin_lock(&inode->i_lock);
+ if (ORANGEFS_I(inode)->attr_valid) {
+ if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
+ gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
+ ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
+ } else {
+ spin_unlock(&inode->i_lock);
+ write_inode_now(inode, 1);
+ goto again;
+ }
+ } else {
+ ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
+ ORANGEFS_I(inode)->attr_uid = current_fsuid();
+ ORANGEFS_I(inode)->attr_gid = current_fsgid();
+ }
+ setattr_copy(&init_user_ns, inode, iattr);
+ spin_unlock(&inode->i_lock);
+ mark_inode_dirty(inode);
+
+ if (iattr->ia_valid & ATTR_MODE)
+ /* change mod on a file that has ACLs */
+ ret = posix_acl_chmod(&init_user_ns, inode, inode->i_mode);
+
+ ret = 0;
+out:
+ return ret;
+}
+
+/*
+ * Change attributes of an object referenced by dentry.
+ */
+int orangefs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
+ struct iattr *iattr)
+{
+ int ret;
+ gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
+ dentry);
+ ret = setattr_prepare(&init_user_ns, dentry, iattr);
+ if (ret)
+ goto out;
+ ret = __orangefs_setattr(d_inode(dentry), iattr);
+ sync_inode_metadata(d_inode(dentry), 1);
+out:
+ gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
+ ret);
+ return ret;
+}
+
+/*
+ * Obtain attributes of an object given a dentry
+ */
+int orangefs_getattr(struct user_namespace *mnt_userns, const struct path *path,
+ struct kstat *stat, u32 request_mask, unsigned int flags)
+{
+ int ret;
+ struct inode *inode = path->dentry->d_inode;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "orangefs_getattr: called on %pd mask %u\n",
+ path->dentry, request_mask);
+
+ ret = orangefs_inode_getattr(inode,
+ request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
+ if (ret == 0) {
+ generic_fillattr(&init_user_ns, inode, stat);
+
+ /* override block size reported to stat */
+ if (!(request_mask & STATX_SIZE))
+ stat->result_mask &= ~STATX_SIZE;
+
+ generic_fill_statx_attr(inode, stat);
+ }
+ return ret;
+}
+
+int orangefs_permission(struct user_namespace *mnt_userns,
+ struct inode *inode, int mask)
+{
+ int ret;
+
+ if (mask & MAY_NOT_BLOCK)
+ return -ECHILD;
+
+ gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
+
+ /* Make sure the permission (and other common attrs) are up to date. */
+ ret = orangefs_inode_getattr(inode, 0);
+ if (ret < 0)
+ return ret;
+
+ return generic_permission(&init_user_ns, inode, mask);
+}
+
+int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
+{
+ struct iattr iattr;
+ gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
+ get_khandle_from_ino(inode));
+ generic_update_time(inode, time, flags);
+ memset(&iattr, 0, sizeof iattr);
+ if (flags & S_ATIME)
+ iattr.ia_valid |= ATTR_ATIME;
+ if (flags & S_CTIME)
+ iattr.ia_valid |= ATTR_CTIME;
+ if (flags & S_MTIME)
+ iattr.ia_valid |= ATTR_MTIME;
+ return __orangefs_setattr(inode, &iattr);
+}
+
+static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
+{
+ u64 val = 0;
+ int ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
+ dentry);
+
+ ret = orangefs_inode_getxattr(d_inode(dentry),
+ "user.pvfs2.meta_hint",
+ &val, sizeof(val));
+ if (ret < 0 && ret != -ENODATA)
+ return ret;
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
+
+ fileattr_fill_flags(fa, val);
+ return 0;
+}
+
+static int orangefs_fileattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct fileattr *fa)
+{
+ u64 val = 0;
+
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
+ dentry);
+ /*
+ * ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
+ * turned on for a file. The user is not allowed to turn on this bit,
+ * but the bit is present if the user first gets the flags and then
+ * updates the flags with some new settings. So, we ignore it in the
+ * following edit. bligon.
+ */
+ if (fileattr_has_fsx(fa) ||
+ (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
+ gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
+ __func__);
+ return -EOPNOTSUPP;
+ }
+ val = fa->flags;
+ gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
+ return orangefs_inode_setxattr(d_inode(dentry),
+ "user.pvfs2.meta_hint",
+ &val, sizeof(val), 0);
+}
+
+/* ORANGEFS2 implementation of VFS inode operations for files */
+static const struct inode_operations orangefs_file_inode_operations = {
+ .get_acl = orangefs_get_acl,
+ .set_acl = orangefs_set_acl,
+ .setattr = orangefs_setattr,
+ .getattr = orangefs_getattr,
+ .listxattr = orangefs_listxattr,
+ .permission = orangefs_permission,
+ .update_time = orangefs_update_time,
+ .fileattr_get = orangefs_fileattr_get,
+ .fileattr_set = orangefs_fileattr_set,
+};
+
+static int orangefs_init_iops(struct inode *inode)
+{
+ inode->i_mapping->a_ops = &orangefs_address_operations;
+
+ switch (inode->i_mode & S_IFMT) {
+ case S_IFREG:
+ inode->i_op = &orangefs_file_inode_operations;
+ inode->i_fop = &orangefs_file_operations;
+ break;
+ case S_IFLNK:
+ inode->i_op = &orangefs_symlink_inode_operations;
+ break;
+ case S_IFDIR:
+ inode->i_op = &orangefs_dir_inode_operations;
+ inode->i_fop = &orangefs_dir_operations;
+ break;
+ default:
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s: unsupported mode\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * Given an ORANGEFS object identifier (fsid, handle), convert it into
+ * a ino_t type that will be used as a hash-index from where the handle will
+ * be searched for in the VFS hash table of inodes.
+ */
+static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
+{
+ if (!ref)
+ return 0;
+ return orangefs_khandle_to_ino(&(ref->khandle));
+}
+
+/*
+ * Called to set up an inode from iget5_locked.
+ */
+static int orangefs_set_inode(struct inode *inode, void *data)
+{
+ struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
+ ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
+ ORANGEFS_I(inode)->refn.khandle = ref->khandle;
+ ORANGEFS_I(inode)->attr_valid = 0;
+ hash_init(ORANGEFS_I(inode)->xattr_cache);
+ ORANGEFS_I(inode)->mapping_time = jiffies - 1;
+ ORANGEFS_I(inode)->bitlock = 0;
+ return 0;
+}
+
+/*
+ * Called to determine if handles match.
+ */
+static int orangefs_test_inode(struct inode *inode, void *data)
+{
+ struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
+ struct orangefs_inode_s *orangefs_inode = NULL;
+
+ orangefs_inode = ORANGEFS_I(inode);
+ /* test handles and fs_ids... */
+ return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
+ &(ref->khandle)) &&
+ orangefs_inode->refn.fs_id == ref->fs_id);
+}
+
+/*
+ * Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
+ * file handle.
+ *
+ * @sb: the file system super block instance.
+ * @ref: The ORANGEFS object for which we are trying to locate an inode.
+ */
+struct inode *orangefs_iget(struct super_block *sb,
+ struct orangefs_object_kref *ref)
+{
+ struct inode *inode = NULL;
+ unsigned long hash;
+ int error;
+
+ hash = orangefs_handle_hash(ref);
+ inode = iget5_locked(sb,
+ hash,
+ orangefs_test_inode,
+ orangefs_set_inode,
+ ref);
+
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
+ if (error) {
+ iget_failed(inode);
+ return ERR_PTR(error);
+ }
+
+ inode->i_ino = hash; /* needed for stat etc */
+ orangefs_init_iops(inode);
+ unlock_new_inode(inode);
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "iget handle %pU, fsid %d hash %ld i_ino %lu\n",
+ &ref->khandle,
+ ref->fs_id,
+ hash,
+ inode->i_ino);
+
+ return inode;
+}
+
+/*
+ * Allocate an inode for a newly created file and insert it into the inode hash.
+ */
+struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
+ int mode, dev_t dev, struct orangefs_object_kref *ref)
+{
+ unsigned long hash = orangefs_handle_hash(ref);
+ struct inode *inode;
+ int error;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
+ __func__,
+ sb,
+ MAJOR(dev),
+ MINOR(dev),
+ mode);
+
+ inode = new_inode(sb);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+
+ orangefs_set_inode(inode, ref);
+ inode->i_ino = hash; /* needed for stat etc */
+
+ error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
+ if (error)
+ goto out_iput;
+
+ orangefs_init_iops(inode);
+ inode->i_rdev = dev;
+
+ error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
+ if (error < 0)
+ goto out_iput;
+
+ gossip_debug(GOSSIP_INODE_DEBUG,
+ "Initializing ACL's for inode %pU\n",
+ get_khandle_from_ino(inode));
+ orangefs_init_acl(inode, dir);
+ return inode;
+
+out_iput:
+ iput(inode);
+ return ERR_PTR(error);
+}