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Merge branch 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

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Pull btrfs fixes from Chris Mason:
 "This has a few fixes from Filipe, along with a readdir fix from Dave
  that we've been testing for some time"

* 'for-linus-4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
  btrfs: properly set the termination value of ctx->pos in readdir
  Btrfs: fix hang on extent buffer lock caused by the inode_paths ioctl
  Btrfs: remove no longer used function extent_read_full_page_nolock()
  Btrfs: fix page reading in extent_same ioctl leading to csum errors
  Btrfs: fix invalid page accesses in extent_same (dedup) ioctl
This commit is contained in:
Linus Torvalds
2016-02-12 09:21:28 -08:00
parent dfc852864d bc4ef7592f
commit 27c9d772e5
8 changed files with 131 additions and 71 deletions
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14
fs/btrfs/inode.c
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@@ -5717,6 +5717,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
char *name_ptr;
int name_len;
int is_curr = 0; /* ctx->pos points to the current index? */
bool emitted;
/* FIXME, use a real flag for deciding about the key type */
if (root->fs_info->tree_root == root)
@@ -5745,6 +5746,7 @@ static int btrfs_real_readdir(struct file *file, struct dir_context *ctx)
if (ret < 0)
goto err;
emitted = false;
while (1) {
leaf = path->nodes[0];
slot = path->slots[0];
@@ -5824,6 +5826,7 @@ skip:
if (over)
goto nopos;
emitted = true;
di_len = btrfs_dir_name_len(leaf, di) +
btrfs_dir_data_len(leaf, di) + sizeof(*di);
di_cur += di_len;
@@ -5836,11 +5839,20 @@ next:
if (key_type == BTRFS_DIR_INDEX_KEY) {
if (is_curr)
ctx->pos++;
ret = btrfs_readdir_delayed_dir_index(ctx, &ins_list);
ret = btrfs_readdir_delayed_dir_index(ctx, &ins_list, &emitted);
if (ret)
goto nopos;
}
/*
* If we haven't emitted any dir entry, we must not touch ctx->pos as
* it was was set to the termination value in previous call. We assume
* that "." and ".." were emitted if we reach this point and set the
* termination value as well for an empty directory.
*/
if (ctx->pos > 2 && !emitted)
goto nopos;
/* Reached end of directory/root. Bump pos past the last item. */
ctx->pos++;