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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-08 06:50:27 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-05-08 06:50:27 +0300 |
| commit | 149e703cb8bfcbdae46140b108bb6f7d2407df8f (patch) | |
| tree | 6fdea7cdd4fb54a272cb7dc3c46cb9f2b84059e9 /Documentation/filesystems | |
| parent | d897166d8598e362a31d79dfd9a1e2eedb9ac85c (diff) | |
| parent | 6ee9706aa22e026f438caabb2982e5f78de2c82c (diff) | |
| download | linux-149e703cb8bfcbdae46140b108bb6f7d2407df8f.tar.xz | |
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro:
"Assorted stuff, with no common topic whatsoever..."
* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
libfs: document simple_get_link()
Documentation/filesystems/Locking: fix ->get_link() prototype
Documentation/filesystems/vfs.txt: document how ->i_link works
Documentation/filesystems/vfs.txt: remove bogus "Last updated" date
fs: use timespec64 in relatime_need_update
fs/block_dev.c: remove unused include
Diffstat (limited to 'Documentation/filesystems')
| -rw-r--r-- | Documentation/filesystems/Locking | 2 | ||||
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 8 |
2 files changed, 7 insertions, 3 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 7b20c385cc02..dac435575384 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -52,7 +52,7 @@ prototypes: int (*rename) (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 **); + const char *(*get_link) (struct dentry *, struct inode *, struct delayed_call *); void (*truncate) (struct inode *); int (*permission) (struct inode *, int, unsigned int); int (*get_acl)(struct inode *, int); diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 761c6fd24a53..57fc576b1f3e 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -3,8 +3,6 @@ Original author: Richard Gooch <rgooch@atnf.csiro.au> - Last updated on June 24, 2007. - Copyright (C) 1999 Richard Gooch Copyright (C) 2005 Pekka Enberg @@ -465,6 +463,12 @@ otherwise noted. argument. If request can't be handled without leaving RCU mode, have it return ERR_PTR(-ECHILD). + If the filesystem stores the symlink target in ->i_link, the + VFS may use it directly without calling ->get_link(); however, + ->get_link() must still be provided. ->i_link must not be + freed until after an RCU grace period. Writing to ->i_link + post-iget() time requires a 'release' memory barrier. + readlink: this is now just an override for use by readlink(2) for the cases when ->get_link uses nd_jump_link() or object is not in fact a symlink. Normally filesystems should only implement |