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| author | Coly Li <coly.li@suse.de> | 2009-04-02 16:59:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-02 19:05:10 -0700 |
| commit | 651d0623045d3265a21ab9803b3a1e0f24a17461 (patch) | |
| tree | dcfe9c374fcf7f36601a870837f19877d926f9aa /fs/reiserfs/super.c | |
| parent | 5b76dc066a4deb937665521566f89aead756f049 (diff) | |
| download | lwn-651d0623045d3265a21ab9803b3a1e0f24a17461.tar.gz lwn-651d0623045d3265a21ab9803b3a1e0f24a17461.zip | |
fs/reiserfs: return f_fsid for statfs(2)
Make reiserfs3 return f_fsid info for statfs(2). By Andreas' suggestion,
this patch populates a persistent f_fsid between boots/mounts with help of
on-disk uuid record.
Randy Dunlap reported a compiling error from v2 patch like:
fs/built-in.o: In function `reiserfs_statfs':
super.c:(.text+0x7332b): undefined reference to `crc32_le'
super.c:(.text+0x7333f): undefined reference to `crc32_le'
Also he provided helpful solution to fix this error. The modification of v3
patch is based on Randy's suggestion, add 'select CRC32' in fs/reiserfs/Kconfig.
Signed-off-by: Coly Li <coly.li@suse.de>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/reiserfs/super.c')
| -rw-r--r-- | fs/reiserfs/super.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 972250c62896..0ae6486d9046 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -27,6 +27,7 @@ #include <linux/mnt_namespace.h> #include <linux/mount.h> #include <linux/namei.h> +#include <linux/crc32.h> struct file_system_type reiserfs_fs_type; @@ -1904,6 +1905,10 @@ static int reiserfs_statfs(struct dentry *dentry, struct kstatfs *buf) buf->f_bsize = dentry->d_sb->s_blocksize; /* changed to accommodate gcc folks. */ buf->f_type = REISERFS_SUPER_MAGIC; + buf->f_fsid.val[0] = (u32)crc32_le(0, rs->s_uuid, sizeof(rs->s_uuid)/2); + buf->f_fsid.val[1] = (u32)crc32_le(0, rs->s_uuid + sizeof(rs->s_uuid)/2, + sizeof(rs->s_uuid)/2); + return 0; } |