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| author | Al Viro <viro@zeniv.linux.org.uk> | 2014-05-01 10:30:00 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-05-01 10:30:00 -0400 |
| commit | 41edf278fc2f042f4e22a12ed87d19c5201210e1 (patch) | |
| tree | 4f49bfe5f401dcc7477fb630f3773a59402b634a /include/linux | |
| parent | 01b6035190b024240a43ac1d8e9c6f964f5f1c63 (diff) | |
| download | linux-41edf278fc2f042f4e22a12ed87d19c5201210e1.tar.gz linux-41edf278fc2f042f4e22a12ed87d19c5201210e1.tar.bz2 linux-41edf278fc2f042f4e22a12ed87d19c5201210e1.zip | |
dentry_kill(): don't try to remove from shrink list
If the victim in on the shrink list, don't remove it from there.
If shrink_dentry_list() manages to remove it from the list before
we are done - fine, we'll just free it as usual. If not - mark
it with new flag (DCACHE_MAY_FREE) and leave it there.
Eventually, shrink_dentry_list() will get to it, remove the sucker
from shrink list and call dentry_kill(dentry, 0). Which is where
we'll deal with freeing.
Since now dentry_kill(dentry, 0) may happen after or during
dentry_kill(dentry, 1), we need to recognize that (by seeing
DCACHE_DENTRY_KILLED already set), unlock everything
and either free the sucker (in case DCACHE_MAY_FREE has been
set) or leave it for ongoing dentry_kill(dentry, 1) to deal with.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/dcache.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/dcache.h b/include/linux/dcache.h index 3b9bfdb83ba6..3c7ec327ebd2 100644 --- a/include/linux/dcache.h +++ b/include/linux/dcache.h @@ -221,6 +221,8 @@ struct dentry_operations { #define DCACHE_SYMLINK_TYPE 0x00300000 /* Symlink */ #define DCACHE_FILE_TYPE 0x00400000 /* Other file type */ +#define DCACHE_MAY_FREE 0x00800000 + extern seqlock_t rename_lock; static inline int dname_external(const struct dentry *dentry) |