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btrfs: refactor btrfs_set_prop and add btrfs_set_prop_trans 

btrfs_set_prop() takes transaction pointer as the first argument,
however in ioctl.c for the purpose of setting the compression property,
we call btrfs_set_prop() with NULL transaction pointer. Down in
the call chain  btrfs_setxattr() starts transaction to update the
attribute and also to update the inode.

So for clarity, create btrfs_set_prop_trans() with no transaction
pointer as argument, in preparation to start transaction here instead of
doing it down the call chain at btrfs_setxattr().

Also now the btrfs_set_prop() is a static function.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2019-03-01 12:34:50 +08:00 committed by David Sterba
parent 419a6f30fd
commit 262c96a3c3
4 changed files with 18 additions and 13 deletions
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12
fs/btrfs/ioctl.c
View File

@ -284,8 +284,8 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
binode->flags &= ~BTRFS_INODE_COMPRESS;
binode->flags |= BTRFS_INODE_NOCOMPRESS;
ret = btrfs_set_prop(NULL, inode, "btrfs.compression", NULL, 0,
0);
ret = btrfs_set_prop_trans(inode, "btrfs.compression", NULL,
0, 0);
if (ret && ret != -ENODATA)
goto out_drop;
} else if (fsflags & FS_COMPR_FL) {
@ -303,14 +303,14 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
if (!comp || comp[0] == 0)
comp = btrfs_compress_type2str(BTRFS_COMPRESS_ZLIB);
ret = btrfs_set_prop(NULL, inode, "btrfs.compression", comp,
strlen(comp), 0);
ret = btrfs_set_prop_trans(inode, "btrfs.compression", comp,
strlen(comp), 0);
if (ret)
goto out_drop;
} else {
ret = btrfs_set_prop(NULL, inode, "btrfs.compression", NULL, 0,
0);
ret = btrfs_set_prop_trans(inode, "btrfs.compression", NULL,
0, 0);
if (ret && ret != -ENODATA)
goto out_drop;
binode->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);

12
fs/btrfs/props.c
View File

@ -55,9 +55,9 @@ find_prop_handler(const char *name,
return NULL;
}
int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const char *value, size_t value_len,
int flags)
static int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const char *value, size_t value_len,
int flags)
{
const struct prop_handler *handler;
int ret;
@ -100,6 +100,12 @@ int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
return 0;
}
int btrfs_set_prop_trans(struct inode *inode, const char *name,
const char *value, size_t value_len, int flags)
{
return btrfs_set_prop(NULL, inode, name, value, value_len, flags);
}
static int iterate_object_props(struct btrfs_root *root,
struct btrfs_path *path,
u64 objectid,

5
fs/btrfs/props.h
View File

@ -10,9 +10,8 @@
void __init btrfs_props_init(void);
int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const char *value, size_t value_len,
int flags);
int btrfs_set_prop_trans(struct inode *inode, const char *name,
const char *value, size_t value_len, int flags);
int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path);

2
fs/btrfs/xattr.c
View File

@ -379,7 +379,7 @@ static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
size_t size, int flags)
{
name = xattr_full_name(handler, name);
return btrfs_set_prop(NULL, inode, name, value, size, flags);
return btrfs_set_prop_trans(inode, name, value, size, flags);
}
static const struct xattr_handler btrfs_security_xattr_handler = {