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authorMarcos Paulo de Souza <mpdesouza@suse.com>2020-02-21 14:56:12 +0100
committerDavid Sterba <dsterba@suse.com>2020-03-23 17:01:42 +0100
commitc0c907a47dccf2cf26251a8fb4a8e7a3bf79ce84 (patch)
tree6d4ea46fc39badcefcf1cd6a94d0b8b48a4817af
parent748449cdbe434731aac68c8829158741a6f8f249 (diff)
btrfs: export helpers for subvolume name/id resolution
The functions will be used outside of export.c and super.c to allow resolving subvolume name from a given id, eg. for subvolume deletion by id ioctl. Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> [ split from the next patch ] Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r--fs/btrfs/ctree.h2
-rw-r--r--fs/btrfs/export.c8
-rw-r--r--fs/btrfs/export.h5
-rw-r--r--fs/btrfs/super.c8
4 files changed, 15 insertions, 8 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index ad275d06e95f..2ee7d8b4968f 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2999,6 +2999,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
unsigned long new_flags);
int btrfs_sync_fs(struct super_block *sb, int wait);
+char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
+ u64 subvol_objectid);
static inline __printf(2, 3) __cold
void btrfs_no_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...)
diff --git a/fs/btrfs/export.c b/fs/btrfs/export.c
index 657fd6ad6e18..25bd4317bf5a 100644
--- a/fs/btrfs/export.c
+++ b/fs/btrfs/export.c
@@ -57,9 +57,9 @@ static int btrfs_encode_fh(struct inode *inode, u32 *fh, int *max_len,
return type;
}
-static struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
- u64 root_objectid, u32 generation,
- int check_generation)
+struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
+ u64 root_objectid, u32 generation,
+ int check_generation)
{
struct btrfs_fs_info *fs_info = btrfs_sb(sb);
struct btrfs_root *root;
@@ -153,7 +153,7 @@ static struct dentry *btrfs_fh_to_dentry(struct super_block *sb, struct fid *fh,
return btrfs_get_dentry(sb, objectid, root_objectid, generation, 1);
}
-static struct dentry *btrfs_get_parent(struct dentry *child)
+struct dentry *btrfs_get_parent(struct dentry *child)
{
struct inode *dir = d_inode(child);
struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb);
diff --git a/fs/btrfs/export.h b/fs/btrfs/export.h
index 57488ecd7d4e..f32f4113c976 100644
--- a/fs/btrfs/export.h
+++ b/fs/btrfs/export.h
@@ -18,4 +18,9 @@ struct btrfs_fid {
u64 parent_root_objectid;
} __attribute__ ((packed));
+struct dentry *btrfs_get_dentry(struct super_block *sb, u64 objectid,
+ u64 root_objectid, u32 generation,
+ int check_generation);
+struct dentry *btrfs_get_parent(struct dentry *child);
+
#endif
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 5c16b4bcde9b..4969fcce0704 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -1024,8 +1024,8 @@ out:
return error;
}
-static char *get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
- u64 subvol_objectid)
+char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info,
+ u64 subvol_objectid)
{
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_root *fs_root = NULL;
@@ -1442,8 +1442,8 @@ static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
goto out;
}
}
- subvol_name = get_subvol_name_from_objectid(btrfs_sb(mnt->mnt_sb),
- subvol_objectid);
+ subvol_name = btrfs_get_subvol_name_from_objectid(
+ btrfs_sb(mnt->mnt_sb), subvol_objectid);
if (IS_ERR(subvol_name)) {
root = ERR_CAST(subvol_name);
subvol_name = NULL;