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| author | Christoph Hellwig <hch@lst.de> | 2010-07-07 18:53:25 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2010-08-09 16:48:44 -0400 |
| commit | 365b18189789bfa1acd9939e6312b8a4b4577b28 (patch) | |
| tree | ffb71da8e11c7751002d018d0b44c41776bc92a3 /include/linux/statfs.h | |
| parent | ebabe9a9001af0af56c0c2780ca1576246e7a74b (diff) | |
| download | lwn-365b18189789bfa1acd9939e6312b8a4b4577b28.tar.gz lwn-365b18189789bfa1acd9939e6312b8a4b4577b28.zip | |
add f_flags to struct statfs(64)
Add a flags field to help glibc implementing statvfs(3) efficiently.
We copy the flag values from glibc, and add a new ST_VALID flag to
denote that f_flags is implemented.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/statfs.h')
| -rw-r--r-- | include/linux/statfs.h | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/include/linux/statfs.h b/include/linux/statfs.h index b34cc829f98d..0166d320a75d 100644 --- a/include/linux/statfs.h +++ b/include/linux/statfs.h @@ -2,7 +2,6 @@ #define _LINUX_STATFS_H #include <linux/types.h> - #include <asm/statfs.h> struct kstatfs { @@ -16,7 +15,29 @@ struct kstatfs { __kernel_fsid_t f_fsid; long f_namelen; long f_frsize; - long f_spare[5]; + long f_flags; + long f_spare[4]; }; +/* + * Definitions for the flag in f_flag. + * + * Generally these flags are equivalent to the MS_ flags used in the mount + * ABI. The exception is ST_VALID which has the same value as MS_REMOUNT + * which doesn't make any sense for statfs. + */ +#define ST_RDONLY 0x0001 /* mount read-only */ +#define ST_NOSUID 0x0002 /* ignore suid and sgid bits */ +#define ST_NODEV 0x0004 /* disallow access to device special files */ +#define ST_NOEXEC 0x0008 /* disallow program execution */ +#define ST_SYNCHRONOUS 0x0010 /* writes are synced at once */ +#define ST_VALID 0x0020 /* f_flags support is implemented */ +#define ST_MANDLOCK 0x0040 /* allow mandatory locks on an FS */ +/* 0x0080 used for ST_WRITE in glibc */ +/* 0x0100 used for ST_APPEND in glibc */ +/* 0x0200 used for ST_IMMUTABLE in glibc */ +#define ST_NOATIME 0x0400 /* do not update access times */ +#define ST_NODIRATIME 0x0800 /* do not update directory access times */ +#define ST_RELATIME 0x1000 /* update atime relative to mtime/ctime */ + #endif |