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Decomission mnt_noasync. Introduce MNTK_NOASYNC mnt_kern_flag which

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allows a filesystem to request VFS to not allow MNTK_ASYNC.

MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2012-03-09 00:12:05 +00:00
parent b1f3262c73
commit 38ddb5725b
4 changed files with 9 additions and 7 deletions
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9
sys/kern/vfs_mount.c
View File

@ -851,7 +851,8 @@ vfs_domount_first(
mp->mnt_optnew = NULL;
MNT_ILOCK(mp);
if ((mp->mnt_flag & MNT_ASYNC) != 0 && mp->mnt_noasync == 0)
if ((mp->mnt_flag & MNT_ASYNC) != 0 &&
(mp->mnt_kern_flag & MNTK_NOASYNC) == 0)
mp->mnt_kern_flag |= MNTK_ASYNC;
else
mp->mnt_kern_flag &= ~MNTK_ASYNC;
@ -991,7 +992,8 @@ vfs_domount_update(
*/
mp->mnt_flag = (mp->mnt_flag & MNT_QUOTA) | (flag & ~MNT_QUOTA);
}
if ((mp->mnt_flag & MNT_ASYNC) != 0 && mp->mnt_noasync == 0)
if ((mp->mnt_flag & MNT_ASYNC) != 0 &&
(mp->mnt_kern_flag & MNTK_NOASYNC) == 0)
mp->mnt_kern_flag |= MNTK_ASYNC;
else
mp->mnt_kern_flag &= ~MNTK_ASYNC;
@ -1351,7 +1353,8 @@ dounmount(mp, flags, td)
}
mp->mnt_kern_flag &= ~(MNTK_UNMOUNT | MNTK_UNMOUNTF);
mp->mnt_flag |= async_flag;
if ((mp->mnt_flag & MNT_ASYNC) != 0 && mp->mnt_noasync == 0)
if ((mp->mnt_flag & MNT_ASYNC) != 0 &&
(mp->mnt_kern_flag & MNTK_NOASYNC) == 0)
mp->mnt_kern_flag |= MNTK_ASYNC;
if (mp->mnt_kern_flag & MNTK_MWAIT) {
mp->mnt_kern_flag &= ~MNTK_MWAIT;

2
sys/kern/vfs_subr.c
View File

@ -2942,6 +2942,7 @@ DB_SHOW_COMMAND(mount, db_show_mount)
MNT_KERN_FLAG(MNTK_REFEXPIRE);
MNT_KERN_FLAG(MNTK_EXTENDED_SHARED);
MNT_KERN_FLAG(MNTK_SHARED_WRITES);
MNT_KERN_FLAG(MNTK_NOASYNC);
MNT_KERN_FLAG(MNTK_UNMOUNT);
MNT_KERN_FLAG(MNTK_MWAIT);
MNT_KERN_FLAG(MNTK_SUSPEND);
@ -2994,7 +2995,6 @@ DB_SHOW_COMMAND(mount, db_show_mount)
db_printf(" mnt_gen = %d\n", mp->mnt_gen);
db_printf(" mnt_nvnodelistsize = %d\n", mp->mnt_nvnodelistsize);
db_printf(" mnt_writeopcount = %d\n", mp->mnt_writeopcount);
db_printf(" mnt_noasync = %u\n", mp->mnt_noasync);
db_printf(" mnt_maxsymlinklen = %d\n", mp->mnt_maxsymlinklen);
db_printf(" mnt_iosize_max = %d\n", mp->mnt_iosize_max);
db_printf(" mnt_hashseed = %u\n", mp->mnt_hashseed);

2
sys/sys/mount.h
View File

@ -167,7 +167,6 @@ struct mount {
int mnt_writeopcount; /* (i) write syscalls pending */
int mnt_kern_flag; /* (i) kernel only flags */
uint64_t mnt_flag; /* (i) flags shared with user */
u_int mnt_noasync; /* (i) # noasync overrides */
struct vfsoptlist *mnt_opt; /* current mount options */
struct vfsoptlist *mnt_optnew; /* new options passed to fs */
int mnt_maxsymlinklen; /* max size of short symlink */
@ -325,6 +324,7 @@ void __mnt_vnode_markerfree(struct vnode **mvp, struct mount *mp);
#define MNTK_REFEXPIRE 0x00000020 /* refcount expiring is happening */
#define MNTK_EXTENDED_SHARED 0x00000040 /* Allow shared locking for more ops */
#define MNTK_SHARED_WRITES 0x00000080 /* Allow shared locking for writes */
#define MNTK_NOASYNC 0x00800000 /* disable async */
#define MNTK_UNMOUNT 0x01000000 /* unmount in progress */
#define MNTK_MWAIT 0x02000000 /* waiting for unmount to finish */
#define MNTK_SUSPEND 0x08000000 /* request write suspension */

3
sys/ufs/ffs/ffs_softdep.c
View File

@ -2368,8 +2368,7 @@ softdep_mount(devvp, mp, fs, cred)
mp->mnt_flag = (mp->mnt_flag & ~MNT_ASYNC) | MNT_SOFTDEP;
if ((mp->mnt_kern_flag & MNTK_SOFTDEP) == 0) {
mp->mnt_kern_flag = (mp->mnt_kern_flag & ~MNTK_ASYNC) |
MNTK_SOFTDEP;
mp->mnt_noasync++;
MNTK_SOFTDEP | MNTK_NOASYNC;
}
MNT_IUNLOCK(mp);
ump = VFSTOUFS(mp);