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| author | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:49:28 +1100 |
|---|---|---|
| committer | Nick Piggin <npiggin@kernel.dk> | 2011-01-07 17:50:20 +1100 |
| commit | b1e6a015a580ad145689ad1d6b4aa0e03e6c868b (patch) | |
| tree | 57a10ef164e4d2f798d9b832dbeaf973aca2ab83 /Documentation/filesystems/vfs.txt | |
| parent | 621e155a3591962420eacdd39f6f0aa29ceb221e (diff) | |
| download | linux-b1e6a015a580ad145689ad1d6b4aa0e03e6c868b.tar.gz linux-b1e6a015a580ad145689ad1d6b4aa0e03e6c868b.tar.xz | |
fs: change d_hash for rcu-walk
Change d_hash so it may be called from lock-free RCU lookups. See similar
patch for d_compare for details.
For in-tree filesystems, this is just a mechanical change.
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
Diffstat (limited to 'Documentation/filesystems/vfs.txt')
| -rw-r--r-- | Documentation/filesystems/vfs.txt | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/Documentation/filesystems/vfs.txt b/Documentation/filesystems/vfs.txt index 250681b8c7cc..69b10ff5ec81 100644 --- a/Documentation/filesystems/vfs.txt +++ b/Documentation/filesystems/vfs.txt @@ -847,7 +847,8 @@ defined: struct dentry_operations { int (*d_revalidate)(struct dentry *, struct nameidata *); - int (*d_hash)(struct dentry *, struct qstr *); + int (*d_hash)(const struct dentry *, const struct inode *, + struct qstr *); int (*d_compare)(const struct dentry *, const struct inode *, const struct dentry *, const struct inode *, unsigned int, const char *, const struct qstr *); @@ -864,7 +865,10 @@ struct dentry_operations { d_hash: called when the VFS adds a dentry to the hash table. The first dentry passed to d_hash is the parent directory that the name is - to be hashed into. + to be hashed into. The inode is the dentry's inode. + + Same locking and synchronisation rules as d_compare regarding + what is safe to dereference etc. d_compare: called to compare a dentry name with a given name. The first dentry is the parent of the dentry to be compared, the second is |