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Use spa as key besides objsetid for snapentry

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objsetid is not unique across pool, so using it solely as key would cause
panic when automounting two snapshot on different pools with the same
objsetid. We fix this by adding spa pointer as additional key.

Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Issue #3948
Issue #3786
Issue #3887
This commit is contained in:
Chunwei Chen
2015-12-07 15:43:53 -08:00
committed by Brian Behlendorf
parent b58986eebf
commit 24ef51f660
3 changed files with 26 additions and 12 deletions
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include/sys/zfs_ctldir.h
+2 -1
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@@ -77,7 +77,8 @@ extern int zfsctl_snapdir_mkdir(struct inode *dip, char *dirname, vattr_t *vap,
extern void zfsctl_snapdir_inactive(struct inode *ip);
extern int zfsctl_snapshot_mount(struct path *path, int flags);
extern int zfsctl_snapshot_unmount(char *snapname, int flags);
extern int zfsctl_snapshot_unmount_delay(uint64_t objsetid, int delay);
extern int zfsctl_snapshot_unmount_delay(spa_t *spa, uint64_t objsetid,
int delay);
extern int zfsctl_lookup_objset(struct super_block *sb, uint64_t objsetid,
zfs_sb_t **zsb);