Instead of updating the binode::flags directly, update a local copy, and then at the point of no error-return copy it to the binode::flags.
Signed-off-by: Anand Jain <[email protected]> --- fs/btrfs/ioctl.c | 57 ++++++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 31 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 1834b576d1cb..b87a249642f7 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -189,9 +189,9 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) struct btrfs_trans_handle *trans; unsigned int fsflags, old_fsflags; int ret; - u64 old_flags; umode_t mode; const char *comp = NULL; + u32 binode_flags = binode->flags; if (!inode_owner_or_capable(inode)) return -EPERM; @@ -212,7 +212,6 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) inode_lock(inode); - old_flags = binode->flags; mode = inode->i_mode; fsflags = btrfs_mask_fsflags_for_type(inode, fsflags); @@ -225,29 +224,29 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) } if (fsflags & FS_SYNC_FL) - binode->flags |= BTRFS_INODE_SYNC; + binode_flags |= BTRFS_INODE_SYNC; else - binode->flags &= ~BTRFS_INODE_SYNC; + binode_flags &= ~BTRFS_INODE_SYNC; if (fsflags & FS_IMMUTABLE_FL) - binode->flags |= BTRFS_INODE_IMMUTABLE; + binode_flags |= BTRFS_INODE_IMMUTABLE; else - binode->flags &= ~BTRFS_INODE_IMMUTABLE; + binode_flags &= ~BTRFS_INODE_IMMUTABLE; if (fsflags & FS_APPEND_FL) - binode->flags |= BTRFS_INODE_APPEND; + binode_flags |= BTRFS_INODE_APPEND; else - binode->flags &= ~BTRFS_INODE_APPEND; + binode_flags &= ~BTRFS_INODE_APPEND; if (fsflags & FS_NODUMP_FL) - binode->flags |= BTRFS_INODE_NODUMP; + binode_flags |= BTRFS_INODE_NODUMP; else - binode->flags &= ~BTRFS_INODE_NODUMP; + binode_flags &= ~BTRFS_INODE_NODUMP; if (fsflags & FS_NOATIME_FL) - binode->flags |= BTRFS_INODE_NOATIME; + binode_flags |= BTRFS_INODE_NOATIME; else - binode->flags &= ~BTRFS_INODE_NOATIME; + binode_flags &= ~BTRFS_INODE_NOATIME; if (fsflags & FS_DIRSYNC_FL) - binode->flags |= BTRFS_INODE_DIRSYNC; + binode_flags |= BTRFS_INODE_DIRSYNC; else - binode->flags &= ~BTRFS_INODE_DIRSYNC; + binode_flags &= ~BTRFS_INODE_DIRSYNC; if (fsflags & FS_NOCOW_FL) { if (S_ISREG(mode)) { /* @@ -256,10 +255,10 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) * status of the file and will not set it. */ if (inode->i_size == 0) - binode->flags |= BTRFS_INODE_NODATACOW - | BTRFS_INODE_NODATASUM; + binode_flags |= BTRFS_INODE_NODATACOW | + BTRFS_INODE_NODATASUM; } else { - binode->flags |= BTRFS_INODE_NODATACOW; + binode_flags |= BTRFS_INODE_NODATACOW; } } else { /* @@ -267,10 +266,10 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) */ if (S_ISREG(mode)) { if (inode->i_size == 0) - binode->flags &= ~(BTRFS_INODE_NODATACOW - | BTRFS_INODE_NODATASUM); + binode_flags &= ~(BTRFS_INODE_NODATACOW | + BTRFS_INODE_NODATASUM); } else { - binode->flags &= ~BTRFS_INODE_NODATACOW; + binode_flags &= ~BTRFS_INODE_NODATACOW; } } @@ -280,8 +279,8 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) * things smaller. */ if (fsflags & FS_NOCOMP_FL) { - binode->flags &= ~BTRFS_INODE_COMPRESS; - binode->flags |= BTRFS_INODE_NOCOMPRESS; + binode_flags &= ~BTRFS_INODE_COMPRESS; + binode_flags |= BTRFS_INODE_NOCOMPRESS; } else if (fsflags & FS_COMPR_FL) { if (IS_SWAPFILE(inode)) { @@ -289,20 +288,20 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) goto out_unlock; } - binode->flags |= BTRFS_INODE_COMPRESS; - binode->flags &= ~BTRFS_INODE_NOCOMPRESS; + binode_flags |= BTRFS_INODE_COMPRESS; + binode_flags &= ~BTRFS_INODE_NOCOMPRESS; comp = btrfs_compress_type2str(fs_info->compress_type); if (!comp || comp[0] == 0) comp = btrfs_compress_type2str(BTRFS_COMPRESS_ZLIB); } else { - binode->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS); + binode_flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS); } trans = btrfs_start_transaction(root, 3); if (IS_ERR(trans)) { ret = PTR_ERR(trans); - goto out_drop; + goto out_unlock; } if (comp) { @@ -323,6 +322,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) } } + binode->flags = binode_flags; btrfs_sync_inode_flags_to_i_flags(inode); inode_inc_iversion(inode); inode->i_ctime = current_time(inode); @@ -330,11 +330,6 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg) out_end_trans: btrfs_end_transaction(trans); - out_drop: - if (ret) { - binode->flags = old_flags; - } - out_unlock: inode_unlock(inode); mnt_drop_write_file(file); -- 2.20.1 (Apple Git-117)
