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gfs2: gfs2_setattr_size error path fix

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When gfs2_setattr_size() fails, it calls gfs2_rs_delete(ip, NULL) to get
rid of any reservations the inode may have.  Instead, it should pass in
the inode's write count as the second parameter to allow
gfs2_rs_delete() to figure out if the inode has any writers left.

In a next step, there are two instances of gfs2_rs_delete(ip, NULL) left
where we know that there can be no other users of the inode.  Replace
those with gfs2_rs_deltree(&ip->i_res) to avoid the unnecessary write
count check.

With that, gfs2_rs_delete() is only called with the inode's actual write
count, so get rid of the second parameter.

Fixes: a097dc7e24 ("GFS2: Make rgrp reservations part of the gfs2_inode structure")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
This commit is contained in:
Andreas Gruenbacher 2021-12-10 14:43:36 +01:00
parent 428f651cb8
commit 7336905a89
6 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/gfs2/bmap.c
View File

@ -2146,7 +2146,7 @@ int gfs2_setattr_size(struct inode *inode, u64 newsize)
ret = do_shrink(inode, newsize);
out:
gfs2_rs_delete(ip, NULL);
gfs2_rs_delete(ip);
gfs2_qa_put(ip);
return ret;
}

2
fs/gfs2/file.c
View File

@ -706,7 +706,7 @@ static int gfs2_release(struct inode *inode, struct file *file)
if (file->f_mode & FMODE_WRITE) {
if (gfs2_rs_active(&ip->i_res))
gfs2_rs_delete(ip, &inode->i_writecount);
gfs2_rs_delete(ip);
gfs2_qa_put(ip);
}
return 0;

2
fs/gfs2/inode.c
View File

@ -793,7 +793,7 @@ fail_free_inode:
if (free_vfs_inode) /* else evict will do the put for us */
gfs2_glock_put(ip->i_gl);
}
gfs2_rs_delete(ip, NULL);
gfs2_rs_deltree(&ip->i_res);
gfs2_qa_put(ip);
fail_free_acls:
posix_acl_release(default_acl);

7
fs/gfs2/rgrp.c
View File

@ -680,13 +680,14 @@ void gfs2_rs_deltree(struct gfs2_blkreserv *rs)
/**
* gfs2_rs_delete - delete a multi-block reservation
* @ip: The inode for this reservation
* @wcount: The inode's write count, or NULL
*
*/
void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount)
void gfs2_rs_delete(struct gfs2_inode *ip)
{
struct inode *inode = &ip->i_inode;
down_write(&ip->i_rw_mutex);
if ((wcount == NULL) || (atomic_read(wcount) <= 1))
if (atomic_read(&inode->i_writecount) <= 1)
gfs2_rs_deltree(&ip->i_res);
up_write(&ip->i_rw_mutex);
}

2
fs/gfs2/rgrp.h
View File

@ -45,7 +45,7 @@ extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
bool dinode, u64 *generation);
extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount);
extern void gfs2_rs_delete(struct gfs2_inode *ip);
extern void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
u64 bstart, u32 blen, int meta);
extern void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,

2
fs/gfs2/super.c
View File

@ -1396,7 +1396,7 @@ out:
truncate_inode_pages_final(&inode->i_data);
if (ip->i_qadata)
gfs2_assert_warn(sdp, ip->i_qadata->qa_ref == 0);
gfs2_rs_delete(ip, NULL);
gfs2_rs_deltree(&ip->i_res);
gfs2_ordered_del_inode(ip);
clear_inode(inode);
gfs2_dir_hash_inval(ip);