diff options
| author |   Al Viro <viro@zeniv.linux.org.uk> | 2016-06-12 11:24:46 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2016-06-12 11:24:46 -0400 |
| commit | ea01a18494b3d7a91b2f1f2a6a5aaef4741bc294 (patch) | |
| tree | 58b50373b64652941796b5b7e03416dd632f4ef8 /fs/autofs4/autofs_i.h | |
| parent | much milder d_walk() race (diff) | |
| download | linux-dev-ea01a18494b3d7a91b2f1f2a6a5aaef4741bc294.tar.xz linux-dev-ea01a18494b3d7a91b2f1f2a6a5aaef4741bc294.zip | |
autofs races
* make autofs4_expire_indirect() skip the dentries being in process of
expiry
* do *not* mess with list_move(); making sure that dentry with
AUTOFS_INF_EXPIRING are not picked for expiry is enough.
* do not remove NO_RCU when we set EXPIRING, don't bother with smp_mb()
there. Clear it at the same time we clear EXPIRING. Makes a bunch of
tests simpler.
* rename NO_RCU to WANT_EXPIRE, which is what it really is.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/autofs4/autofs_i.h')
| -rw-r--r-- | fs/autofs4/autofs_i.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/autofs4/autofs_i.h b/fs/autofs4/autofs_i.h index f0d268b97d19..a439548de785 100644 --- a/fs/autofs4/autofs_i.h +++ b/fs/autofs4/autofs_i.h @@ -70,9 +70,13 @@ struct autofs_info { }; #define AUTOFS_INF_EXPIRING (1<<0) /* dentry in the process of expiring */ -#define AUTOFS_INF_NO_RCU (1<<1) /* the dentry is being considered +#define AUTOFS_INF_WANT_EXPIRE (1<<1) /* the dentry is being considered * for expiry, so RCU_walk is - * not permitted + * not permitted. If it progresses to + * actual expiry attempt, the flag is + * not cleared when EXPIRING is set - + * in that case it gets cleared only + * when it comes to clearing EXPIRING. */ #define AUTOFS_INF_PENDING (1<<2) /* dentry pending mount */ |