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author | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-11 06:02:51 +0300 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-10-11 06:02:51 +0300 |
commit | 3873691e5ab34fa26948643d038a2b98c4437298 (patch) | |
tree | 5327469194c2167830bce38b56a618b754cdbeea /Documentation/filesystems | |
parent | c2050a454c7f123d7a57fa1d76ff61bd43643abb (diff) | |
parent | aadfa8019e8114539cfa0b1eb2e5a9c83094a590 (diff) | |
download | linux-3873691e5ab34fa26948643d038a2b98c4437298.tar.xz |
Merge remote-tracking branch 'ovl/rename2' into for-linus
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r-- | Documentation/filesystems/Locking | 8 | ||||
-rw-r--r-- | Documentation/filesystems/directory-locking | 2 | ||||
-rw-r--r-- | Documentation/filesystems/porting | 4 | ||||
-rw-r--r-- | Documentation/filesystems/vfs.txt | 9 |
4 files changed, 9 insertions, 14 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index d30fb2cb5066..fe15682e8acd 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -51,8 +51,6 @@ prototypes: int (*rmdir) (struct inode *,struct dentry *); int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t); int (*rename) (struct inode *, struct dentry *, - struct inode *, struct dentry *); - int (*rename2) (struct inode *, struct dentry *, struct inode *, struct dentry *, unsigned int); int (*readlink) (struct dentry *, char __user *,int); const char *(*get_link) (struct dentry *, struct inode *, void **); @@ -83,8 +81,7 @@ symlink: yes mkdir: yes unlink: yes (both) rmdir: yes (both) (see below) -rename: yes (all) (see below) -rename2: yes (all) (see below) +rename: yes (all) (see below) readlink: no get_link: no setattr: yes @@ -102,8 +99,7 @@ tmpfile: no Additionally, ->rmdir(), ->unlink() and ->rename() have ->i_mutex on victim. - cross-directory ->rename() and rename2() has (per-superblock) -->s_vfs_rename_sem. + cross-directory ->rename() has (per-superblock) ->s_vfs_rename_sem. See Documentation/filesystems/directory-locking for more detailed discussion of the locking scheme for directory operations. diff --git a/Documentation/filesystems/directory-locking b/Documentation/filesystems/directory-locking index c314badbcfc6..4e32cb961e5b 100644 --- a/Documentation/filesystems/directory-locking +++ b/Documentation/filesystems/directory-locking @@ -19,7 +19,7 @@ locks victim and calls the method. Locks are exclusive. 4) rename() that is _not_ cross-directory. Locking rules: caller locks the parent and finds source and target. In case of exchange (with -RENAME_EXCHANGE in rename2() flags argument) lock both. In any case, +RENAME_EXCHANGE in flags argument) lock both. In any case, if the target already exists, lock it. If the source is a non-directory, lock it. If we need to lock both, lock them in inode pointer order. Then call the method. All locks are exclusive. diff --git a/Documentation/filesystems/porting b/Documentation/filesystems/porting index b1bd05ea66b2..1ab28d9b612a 100644 --- a/Documentation/filesystems/porting +++ b/Documentation/filesystems/porting @@ -592,3 +592,7 @@ in your dentry operations instead. work just as well; if it's something more complicated, use dentry->d_parent. Just be careful not to assume that fetching it more than once will yield the same value - in RCU mode it could change under you. +-- +[mandatory] + ->rename() has an added flags argument. Any flags not handled by the + filesystem should result in EINVAL being returned. diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 9ace359d6cc5..b6bfa0bc02f8 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -346,8 +346,6 @@ struct inode_operations { int (*rmdir) (struct inode *,struct dentry *); int (*mknod) (struct inode *,struct dentry *,umode_t,dev_t); int (*rename) (struct inode *, struct dentry *, - struct inode *, struct dentry *); - int (*rename2) (struct inode *, struct dentry *, struct inode *, struct dentry *, unsigned int); int (*readlink) (struct dentry *, char __user *,int); const char *(*get_link) (struct dentry *, struct inode *, @@ -416,11 +414,8 @@ otherwise noted. rename: called by the rename(2) system call to rename the object to have the parent and name given by the second inode and dentry. - rename2: this has an additional flags argument compared to rename. - If no flags are supported by the filesystem then this method - need not be implemented. If some flags are supported then the - filesystem must return -EINVAL for any unsupported or unknown - flags. Currently the following flags are implemented: + The filesystem must return -EINVAL for any unsupported or + unknown flags. Currently the following flags are implemented: (1) RENAME_NOREPLACE: this flag indicates that if the target of the rename exists the rename should fail with -EEXIST instead of replacing the target. The VFS already checks for |