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| author | Luke Dashjr <luke@dashjr.org> | 2015-10-29 08:22:21 +0000 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2016-08-22 22:37:08 +0100 |
| commit | b3c5772b41836592dc50a69cf4be67ec65492409 (patch) | |
| tree | dcff024155e8acc523c74baeaa86ed546bffad1d /fs | |
| parent | 4a223a2dd4e405a1c1022e7a6787fdc5239ad7e5 (diff) | |
| download | linux-rt-b3c5772b41836592dc50a69cf4be67ec65492409.tar.gz | |
btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in btrfs_ioctl
commit 4c63c2454eff996c5e27991221106eb511f7db38 upstream.
32-bit ioctl uses these rather than the regular FS_IOC_* versions. They can
be handled in btrfs using the same code. Without this, 32-bit {ch,ls}attr
fail.
Signed-off-by: Luke Dashjr <luke-jr+git@utopios.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/ctree.h | 1 | ||||
| -rw-r--r-- | fs/btrfs/file.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 2 | ||||
| -rw-r--r-- | fs/btrfs/ioctl.c | 21 |
4 files changed, 24 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 0d9228bd5a80..c8878fdfb458 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2749,6 +2749,7 @@ extern const struct dentry_operations btrfs_dentry_operations; /* ioctl.c */ long btrfs_ioctl(struct file *file, unsigned int cmd, unsigned long arg); +long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg); void btrfs_update_iflags(struct inode *inode); void btrfs_inherit_iflags(struct inode *inode, struct inode *dir); int btrfs_defrag_file(struct inode *inode, struct file *file, diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index a1da0ab783ca..b4de5c0ecbbf 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1895,6 +1895,6 @@ const struct file_operations btrfs_file_operations = { .fallocate = btrfs_fallocate, .unlocked_ioctl = btrfs_ioctl, #ifdef CONFIG_COMPAT - .compat_ioctl = btrfs_ioctl, + .compat_ioctl = btrfs_compat_ioctl, #endif }; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 007d487eeb6c..9a7efbec8c63 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -7475,7 +7475,7 @@ static const struct file_operations btrfs_dir_file_operations = { .readdir = btrfs_real_readdir, .unlocked_ioctl = btrfs_ioctl, #ifdef CONFIG_COMPAT - .compat_ioctl = btrfs_ioctl, + .compat_ioctl = btrfs_compat_ioctl, #endif .release = btrfs_release_file, .fsync = btrfs_sync_file, diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index f1ca90909362..eb6a0e6f6ecd 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3260,3 +3260,24 @@ long btrfs_ioctl(struct file *file, unsigned int return -ENOTTY; } + +#ifdef CONFIG_COMPAT +long btrfs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case FS_IOC32_GETFLAGS: + cmd = FS_IOC_GETFLAGS; + break; + case FS_IOC32_SETFLAGS: + cmd = FS_IOC_SETFLAGS; + break; + case FS_IOC32_GETVERSION: + cmd = FS_IOC_GETVERSION; + break; + default: + return -ENOIOCTLCMD; + } + + return btrfs_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); +} +#endif |