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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-08-19 18:59:33 -0400 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2013-08-22 08:58:17 -0400 |
| commit | f4ce1299b329e96bb247c95c4fee8809827d6931 (patch) | |
| tree | b4056d4f78b0594f84c8e4b3beda565a05751993 /fs/nfs/dir.c | |
| parent | 1264a2f053a32376696e51184f086d35113e75ff (diff) | |
| download | blackbird-obmc-linux-f4ce1299b329e96bb247c95c4fee8809827d6931.tar.gz blackbird-obmc-linux-f4ce1299b329e96bb247c95c4fee8809827d6931.zip | |
NFS: Add event tracing for generic NFS events
Add tracepoints for inode attribute updates, attribute revalidation,
writeback start/end fsync start/end, attribute change start/end,
permission check start/end.
The intention is to enable performance tracing using 'perf'as well as
improving debugging.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/dir.c')
| -rw-r--r-- | fs/nfs/dir.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 5d737bd52288..be3da6fe3ad4 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -43,6 +43,8 @@ #include "internal.h" #include "fscache.h" +#include "nfstrace.h" + /* #define NFS_DEBUG_VERBOSE 1 */ static int nfs_opendir(struct inode *, struct file *); @@ -2178,9 +2180,11 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) struct nfs_access_entry cache; int status; + trace_nfs_access_enter(inode); + status = nfs_access_get_cached(inode, cred, &cache); if (status == 0) - goto out; + goto out_cached; /* Be clever: ask server to check for all possible rights */ cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ; @@ -2193,13 +2197,15 @@ static int nfs_do_access(struct inode *inode, struct rpc_cred *cred, int mask) if (!S_ISDIR(inode->i_mode)) set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); } - return status; + goto out; } nfs_access_add_cache(inode, &cache); +out_cached: + if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) != 0) + status = -EACCES; out: - if ((mask & ~cache.mask & (MAY_READ | MAY_WRITE | MAY_EXEC)) == 0) - return 0; - return -EACCES; + trace_nfs_access_exit(inode, status); + return status; } static int nfs_open_permission_mask(int openflags) |
