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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-11-25 19:05:41 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-11-25 19:05:41 -0800 |
| commit | b914c5b2130239fd378d1a719ab3c53f0c782be9 (patch) | |
| tree | b3852bd4c4a1d040432e42666e8c8825e26d9cea /fs | |
| parent | Merge git://git.kvack.org/~bcrl/aio-fixes (diff) | |
| parent | nfsd: Fix slot wake up race in the nfsv4.1 callback code (diff) | |
| download | linux-dev-b914c5b2130239fd378d1a719ab3c53f0c782be9.tar.xz linux-dev-b914c5b2130239fd378d1a719ab3c53f0c782be9.zip | |
Merge branch 'for-3.18' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from Bruce Fields:
"These fix one mishandling of the case when security labels are
configured out, and two races in the 4.1 backchannel code"
* 'for-3.18' of git://linux-nfs.org/~bfields/linux:
nfsd: Fix slot wake up race in the nfsv4.1 callback code
SUNRPC: Fix locking around callback channel reply receive
nfsd: correctly define v4.2 support attributes
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/nfsd/nfs4callback.c | 8 | ||||
| -rw-r--r-- | fs/nfsd/nfsd.h | 9 |
2 files changed, 12 insertions, 5 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c index ed2b1151b171..7cbdf1b2e4ab 100644 --- a/fs/nfsd/nfs4callback.c +++ b/fs/nfsd/nfs4callback.c @@ -774,8 +774,12 @@ static bool nfsd41_cb_get_slot(struct nfs4_client *clp, struct rpc_task *task) { if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) { rpc_sleep_on(&clp->cl_cb_waitq, task, NULL); - dprintk("%s slot is busy\n", __func__); - return false; + /* Race breaker */ + if (test_and_set_bit(0, &clp->cl_cb_slot_busy) != 0) { + dprintk("%s slot is busy\n", __func__); + return false; + } + rpc_wake_up_queued_task(&clp->cl_cb_waitq, task); } return true; } diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h index 747f3b95bd11..33a46a8dfaf7 100644 --- a/fs/nfsd/nfsd.h +++ b/fs/nfsd/nfsd.h @@ -335,12 +335,15 @@ void nfsd_lockd_shutdown(void); (NFSD4_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SUPPATTR_EXCLCREAT) #ifdef CONFIG_NFSD_V4_SECURITY_LABEL -#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ - (NFSD4_1_SUPPORTED_ATTRS_WORD2 | FATTR4_WORD2_SECURITY_LABEL) +#define NFSD4_2_SECURITY_ATTRS FATTR4_WORD2_SECURITY_LABEL #else -#define NFSD4_2_SUPPORTED_ATTRS_WORD2 0 +#define NFSD4_2_SECURITY_ATTRS 0 #endif +#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \ + (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \ + NFSD4_2_SECURITY_ATTRS) + static inline u32 nfsd_suppattrs0(u32 minorversion) { return minorversion ? NFSD4_1_SUPPORTED_ATTRS_WORD0 |