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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-29 11:06:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-29 11:06:13 -0700 |
| commit | 3644286f6cbcea86f6fa4d308e7ac06bf2a3715a (patch) | |
| tree | d052231d1029d3e4f783c9b74b295eb07d194130 /include/linux/statfs.h | |
| parent | 767fcbc80f63d7f08ff6c0858fe33583e6fdd327 (diff) | |
| parent | 59cda49ecf6c9a32fae4942420701b6e087204f6 (diff) | |
| download | lwn-3644286f6cbcea86f6fa4d308e7ac06bf2a3715a.tar.gz lwn-3644286f6cbcea86f6fa4d308e7ac06bf2a3715a.zip | |
Merge tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fsnotify updates from Jan Kara:
- support for limited fanotify functionality for unpriviledged users
- faster merging of fanotify events
- a few smaller fsnotify improvements
* tag 'fsnotify_for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
shmem: allow reporting fanotify events with file handles on tmpfs
fs: introduce a wrapper uuid_to_fsid()
fanotify_user: use upper_32_bits() to verify mask
fanotify: support limited functionality for unprivileged users
fanotify: configurable limits via sysfs
fanotify: limit number of event merge attempts
fsnotify: use hash table for faster events merge
fanotify: mix event info and pid into merge key hash
fanotify: reduce event objectid to 29-bit hash
fsnotify: allow fsnotify_{peek,remove}_first_event with empty queue
Diffstat (limited to 'include/linux/statfs.h')
| -rw-r--r-- | include/linux/statfs.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/statfs.h b/include/linux/statfs.h index 20f695b90aab..02c862686ea3 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -4,6 +4,7 @@ #include <linux/types.h> #include <asm/statfs.h> +#include <asm/byteorder.h> struct kstatfs { long f_type; @@ -50,4 +51,11 @@ static inline __kernel_fsid_t u64_to_fsid(u64 v) return (__kernel_fsid_t){.val = {(u32)v, (u32)(v>>32)}}; } +/* Fold 16 bytes uuid to 64 bit fsid */ +static inline __kernel_fsid_t uuid_to_fsid(__u8 *uuid) +{ + return u64_to_fsid(le64_to_cpup((void *)uuid) ^ + le64_to_cpup((void *)(uuid + sizeof(u64)))); +} + #endif |