Messages in this thread Patch in this message | | | Subject | vfs: Add MS_FLUSHONFSYNC mount flag | From | Fernando Luis Vázquez Cao <> | Date | Thu, 12 Feb 2009 19:36:10 +0900 |
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This mount flag will be used to determine whether the block device's write cache should be flush or not on fsync()/fdatasync().
Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> ---
diff -urNp linux-2.6.29-rc3-orig/fs/namespace.c linux-2.6.29-rc3/fs/namespace.c --- linux-2.6.29-rc3-orig/fs/namespace.c 2009-01-29 09:47:51.000000000 +0900 +++ linux-2.6.29-rc3/fs/namespace.c 2009-01-29 18:40:04.000000000 +0900 @@ -1933,8 +1933,8 @@ long do_mount(char *dev_name, char *dir_ if (flags & MS_RDONLY) mnt_flags |= MNT_READONLY; - flags &= ~(MS_NOSUID | MS_NOEXEC | MS_NODEV | MS_ACTIVE | - MS_NOATIME | MS_NODIRATIME | MS_RELATIME| MS_KERNMOUNT); + flags &= ~(MS_NOSUID | MS_NODEV | MS_NOEXEC | MS_NOATIME | + MS_NODIRATIME | MS_RELATIME | MS_ACTIVE | MS_KERNMOUNT); /* ... and get the mountpoint */ retval = kern_path(dir_name, LOOKUP_FOLLOW, &path); diff -urNp linux-2.6.29-rc3-orig/include/linux/fs.h linux-2.6.29-rc3/include/linux/fs.h --- linux-2.6.29-rc3-orig/include/linux/fs.h 2009-01-29 10:04:18.000000000 +0900 +++ linux-2.6.29-rc3/include/linux/fs.h 2009-01-29 10:24:14.000000000 +0900 @@ -135,6 +135,8 @@ struct inodes_stat_t { #define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */ #define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */ #define MS_I_VERSION (1<<23) /* Update inode I_version field */ +#define MS_FLUSHONFSYNC (1<<24) /* Force block device flush on + fsync()/fdatasync() */ #define MS_ACTIVE (1<<30) #define MS_NOUSER (1<<31)
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