c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 18:40:43 +03:00
Code Issues Packages Projects Releases Wiki Activity

Use native inode->i_nlink instead of znode->z_links

Browse Source 
A mostly mechanical change, taking into account i_nlink is 32 bits vs ZFS's
64 bit on-disk link count.

We revert "xattr dir doesn't get purged during iput" (ddae16a) as this is a
more Linux-integrated fix for the same issue.

In addition, setting the initial link count on a new node has been changed
from setting one less than required in zfs_mknode() then incrementing to the
correct count in zfs_link_create() (which was somewhat bizarre in the first
place), to setting the correct count in zfs_mknode() and not incrementing it
in zfs_link_create(). This both means we no longer set the link count in
sa_bulk_update() twice (once for the initial incorrect count then again for
the correct count), as well as adhering to the Linux requirement of not
incrementing a zero link count without I_LINKABLE (see linux commit
f4e0c30c).

Signed-off-by: Chris Dunlop <chris@onthe.net.au>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
Closes #4838
Issue #227
This commit is contained in:
Chris Dunlop
2016-07-15 00:44:38 +10:00
committed by Brian Behlendorf
parent 02de3e3c5d
commit dfbc86309f
7 changed files with 58 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files
module/zfs/zfs_znode.c
+11 -6
View File
@@ -535,7 +535,6 @@ zfs_inode_update_impl(znode_t *zp, boolean_t new)
spin_lock(&ip->i_lock);
ip->i_uid = SUID_TO_KUID(zp->z_uid);
ip->i_gid = SGID_TO_KGID(zp->z_gid);
set_nlink(ip, zp->z_links);
ip->i_mode = zp->z_mode;
zfs_set_inode_flags(zp, ip);
ip->i_blkbits = SPA_MINBLOCKSHIFT;
@@ -582,6 +581,7 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
uint64_t mode;
uint64_t parent;
uint64_t tmp_gen;
uint64_t links;
sa_bulk_attr_t bulk[8];
int count = 0;
@@ -616,7 +616,7 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_MODE(zsb), NULL, &mode, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_GEN(zsb), NULL, &tmp_gen, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zsb), NULL, &zp->z_size, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zsb), NULL, &zp->z_links, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zsb), NULL, &links, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
&zp->z_pflags, 8);
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_PARENT(zsb), NULL,
@@ -635,6 +635,7 @@ zfs_znode_alloc(zfs_sb_t *zsb, dmu_buf_t *db, int blksz,
zp->z_mode = mode;
ip->i_generation = (uint32_t)tmp_gen;
set_nlink(ip, (uint32_t)links);
ip->i_ino = obj;
zfs_inode_update_new(zp);
@@ -798,9 +799,10 @@ zfs_mknode(znode_t *dzp, vattr_t *vap, dmu_tx_t *tx, cred_t *cr,
if (S_ISDIR(vap->va_mode)) {
size = 2; /* contents ("." and "..") */
links = (flag & (IS_ROOT_NODE | IS_XATTR)) ? 2 : 1;
links = 2;
} else {
size = links = 0;
size = 0;
links = 1;
}
if (S_ISBLK(vap->va_mode) || S_ISCHR(vap->va_mode))
@@ -1152,6 +1154,7 @@ zfs_rezget(znode_t *zp)
dmu_buf_t *db;
uint64_t obj_num = zp->z_id;
uint64_t mode;
uint64_t links;
sa_bulk_attr_t bulk[7];
int err;
int count = 0;
@@ -1209,7 +1212,7 @@ zfs_rezget(znode_t *zp)
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_SIZE(zsb), NULL,
&zp->z_size, sizeof (zp->z_size));
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_LINKS(zsb), NULL,
&zp->z_links, sizeof (zp->z_links));
&links, sizeof (links));
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_FLAGS(zsb), NULL,
&zp->z_pflags, sizeof (zp->z_pflags));
SA_ADD_BULK_ATTR(bulk, count, SA_ZPL_UID(zsb), NULL,
@@ -1233,7 +1236,9 @@ zfs_rezget(znode_t *zp)
return (SET_ERROR(EIO));
}
zp->z_unlinked = (zp->z_links == 0);
zp->z_unlinked = (ZTOI(zp)->i_nlink == 0);
set_nlink(ZTOI(zp), (uint32_t)links);
zp->z_blksz = doi.doi_data_block_size;
zp->z_atime_dirty = 0;
zfs_inode_update_new(zp);