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| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-06-30 13:10:49 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2016-06-30 13:10:49 +0200 |
| commit | 5c672ab3f0ee0f78f7acad183f34db0f8781a200 (patch) | |
| tree | 8504dad9b399cbef1a3e252c7253325d51740eae /fs/fuse/fuse_i.h | |
| parent | 4c2e07c6a29e0129e975727b9f57eede813eea85 (diff) | |
| download | lwn-5c672ab3f0ee0f78f7acad183f34db0f8781a200.tar.gz lwn-5c672ab3f0ee0f78f7acad183f34db0f8781a200.zip | |
fuse: serialize dirops by default
Negotiate with userspace filesystems whether they support parallel readdir
and lookup. Disable parallelism by default for fear of breaking fuse
filesystems.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: 9902af79c01a ("parallel lookups: actual switch to rwsem")
Fixes: d9b3dbdcfd62 ("fuse: switch to ->iterate_shared()")
Diffstat (limited to 'fs/fuse/fuse_i.h')
| -rw-r--r-- | fs/fuse/fuse_i.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index eddbe02c4028..929c383432b0 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -110,6 +110,9 @@ struct fuse_inode { /** Miscellaneous bits describing inode state */ unsigned long state; + + /** Lock for serializing lookup and readdir for back compatibility*/ + struct mutex mutex; }; /** FUSE inode state bits */ @@ -540,6 +543,9 @@ struct fuse_conn { /** write-back cache policy (default is write-through) */ unsigned writeback_cache:1; + /** allow parallel lookups and readdir (default is serialized) */ + unsigned parallel_dirops:1; + /* * The following bitfields are only for optimization purposes * and hence races in setting them will not cause malfunction @@ -956,4 +962,7 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr, void fuse_set_initialized(struct fuse_conn *fc); +void fuse_unlock_inode(struct inode *inode); +void fuse_lock_inode(struct inode *inode); + #endif /* _FS_FUSE_I_H */ |