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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-08-15 16:33:57 +0200 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-10-23 02:24:35 +0200 |
| commit | dc3d3b810a644dfa329efaa230cd514226f8981d (patch) | |
| tree | e0a2c2bfb3edb6b1fa4383cb2d1f52adb653c9e2 /fs/nilfs2/nilfs.h | |
| parent | nilfs2: use checkpoint tree for mount check of snapshots (diff) | |
| download | linux-dc3d3b810a644dfa329efaa230cd514226f8981d.tar.xz linux-dc3d3b810a644dfa329efaa230cd514226f8981d.zip | |
nilfs2: deny write access to inodes in snapshots
Snapshots of nilfs are read-only.
After super block instances (sb) will be unified, nilfs will need to
check write access by a way other than implicit test with
IS_RDONLY(inode). This is because IS_RDONLY() refers to MS_RDONLY bit
of inode->i_sb->s_flags and it will become inaccurate after the
unification of sb.
To prepare for the issue, this uses i_op->permission to deny write
access to inodes in snapshots.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to '')
| -rw-r--r-- | fs/nilfs2/nilfs.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h index 3870c109aba3..cf5507a2a178 100644 --- a/fs/nilfs2/nilfs.h +++ b/fs/nilfs2/nilfs.h @@ -201,12 +201,9 @@ static inline struct inode *nilfs_dat_inode(const struct the_nilfs *nilfs) */ #ifdef CONFIG_NILFS_POSIX_ACL #error "NILFS: not yet supported POSIX ACL" -extern int nilfs_permission(struct inode *, int, struct nameidata *); extern int nilfs_acl_chmod(struct inode *); extern int nilfs_init_acl(struct inode *, struct inode *); #else -#define nilfs_permission NULL - static inline int nilfs_acl_chmod(struct inode *inode) { return 0; @@ -256,6 +253,7 @@ extern void nilfs_update_inode(struct inode *, struct buffer_head *); extern void nilfs_truncate(struct inode *); extern void nilfs_evict_inode(struct inode *); extern int nilfs_setattr(struct dentry *, struct iattr *); +int nilfs_permission(struct inode *inode, int mask); extern int nilfs_load_inode_block(struct nilfs_sb_info *, struct inode *, struct buffer_head **); extern int nilfs_inode_dirty(struct inode *); |