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Generalize ffs_pages_remove() into vn_pages_remove().

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Remove mapped pages for all dataset vnodes in zfs_rezget() using
new vn_pages_remove() to fix mmapped files changed by
zfs rollback or zfs receive -F.

PR:		kern/160035, kern/156933
Reviewed by:	kib, pjd
Approved by:	re (kib)
MFC after:	1 week
This commit is contained in:
Martin Matuska 2011-08-25 08:17:39 +00:00
parent fc96aabef1
commit 82378711f9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=225166
6 changed files with 28 additions and 20 deletions
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13
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_znode.c
View File

@ -1273,6 +1273,7 @@ zfs_rezget(znode_t *zp)
zfsvfs_t *zfsvfs = zp->z_zfsvfs;
dmu_object_info_t doi;
dmu_buf_t *db;
vnode_t *vp;
uint64_t obj_num = zp->z_id;
uint64_t mode, size;
sa_bulk_attr_t bulk[8];
@ -1348,8 +1349,9 @@ zfs_rezget(znode_t *zp)
* that for example regular file was replaced with directory
* which has the same object number.
*/
if (ZTOV(zp) != NULL &&
ZTOV(zp)->v_type != IFTOVT((mode_t)zp->z_mode)) {
vp = ZTOV(zp);
if (vp != NULL &&
vp->v_type != IFTOVT((mode_t)zp->z_mode)) {
zfs_znode_dmu_fini(zp);
ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);
return (EIO);
@ -1357,8 +1359,11 @@ zfs_rezget(znode_t *zp)
zp->z_unlinked = (zp->z_links == 0);
zp->z_blksz = doi.doi_data_block_size;
if (zp->z_size != size && ZTOV(zp) != NULL)
vnode_pager_setsize(ZTOV(zp), zp->z_size);
if (vp != NULL) {
vn_pages_remove(vp, 0, 0);
if (zp->z_size != size)
vnode_pager_setsize(vp, zp->z_size);
}
ZFS_OBJ_HOLD_EXIT(zfsvfs, obj_num);

15
sys/kern/vfs_vnops.c
View File

@ -64,6 +64,9 @@ __FBSDID("$FreeBSD$");
#include <security/audit/audit.h>
#include <security/mac/mac_framework.h>
#include <vm/vm.h>
#include <vm/vm_object.h>
static fo_rdwr_t vn_read;
static fo_rdwr_t vn_write;
static fo_truncate_t vn_truncate;
@ -1398,3 +1401,15 @@ vn_chown(struct file *fp, uid_t uid, gid_t gid, struct ucred *active_cred,
VFS_UNLOCK_GIANT(vfslocked);
return (error);
}
void
vn_pages_remove(struct vnode *vp, vm_pindex_t start, vm_pindex_t end)
{
vm_object_t object;
if ((object = vp->v_object) == NULL)
return;
VM_OBJECT_LOCK(object);
vm_object_page_remove(object, start, end, 0);
VM_OBJECT_UNLOCK(object);
}

1
sys/sys/vnode.h
View File

@ -640,6 +640,7 @@ int _vn_lock(struct vnode *vp, int flags, char *file, int line);
int vn_open(struct nameidata *ndp, int *flagp, int cmode, struct file *fp);
int vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
u_int vn_open_flags, struct ucred *cred, struct file *fp);
void vn_pages_remove(struct vnode *vp, vm_pindex_t start, vm_pindex_t end);
int vn_pollrecord(struct vnode *vp, struct thread *p, int events);
int vn_rdwr(enum uio_rw rw, struct vnode *vp, void *base,
int len, off_t offset, enum uio_seg segflg, int ioflg,

1
sys/ufs/ffs/ffs_extern.h
View File

@ -79,7 +79,6 @@ int ffs_isfreeblock(struct fs *, u_char *, ufs1_daddr_t);
void ffs_load_inode(struct buf *, struct inode *, struct fs *, ino_t);
int ffs_mountroot(void);
void ffs_oldfscompat_write(struct fs *, struct ufsmount *);
void ffs_pages_remove(struct vnode *vp, vm_pindex_t start, vm_pindex_t end);
int ffs_reallocblks(struct vop_reallocblks_args *);
int ffs_realloccg(struct inode *, ufs2_daddr_t, ufs2_daddr_t,
ufs2_daddr_t, int, int, int, struct ucred *, struct buf **);

14
sys/ufs/ffs/ffs_inode.c
View File

@ -120,18 +120,6 @@ ffs_update(vp, waitfor)
}
}
void
ffs_pages_remove(struct vnode *vp, vm_pindex_t start, vm_pindex_t end)
{
vm_object_t object;
if ((object = vp->v_object) == NULL)
return;
VM_OBJECT_LOCK(object);
vm_object_page_remove(object, start, end, 0);
VM_OBJECT_UNLOCK(object);
}
#define SINGLE 0 /* index of single indirect block */
#define DOUBLE 1 /* index of double indirect block */
#define TRIPLE 2 /* index of triple indirect block */
@ -219,7 +207,7 @@ ffs_truncate(vp, length, flags, cred, td)
(void) chkdq(ip, -extblocks, NOCRED, 0);
#endif
vinvalbuf(vp, V_ALT, 0, 0);
ffs_pages_remove(vp,
vn_pages_remove(vp,
OFF_TO_IDX(lblktosize(fs, -extblocks)), 0);
osize = ip->i_din2->di_extsize;
ip->i_din2->di_blocks -= extblocks;

4
sys/ufs/ffs/ffs_softdep.c
View File

@ -6541,7 +6541,7 @@ trunc_pages(ip, length, extblocks, flags)
fs = ip->i_fs;
extend = OFF_TO_IDX(lblktosize(fs, -extblocks));
if ((flags & IO_EXT) != 0)
ffs_pages_remove(vp, extend, 0);
vn_pages_remove(vp, extend, 0);
if ((flags & IO_NORMAL) == 0)
return;
BO_LOCK(&vp->v_bufobj);
@ -6567,7 +6567,7 @@ trunc_pages(ip, length, extblocks, flags)
end = OFF_TO_IDX(lblktosize(fs, lbn));
} else
end = extend;
ffs_pages_remove(vp, OFF_TO_IDX(OFF_MAX), end);
vn_pages_remove(vp, OFF_TO_IDX(OFF_MAX), end);
}
/*