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linux-sg2042
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9p: Convert to separately allocated bdi 

Allocate struct backing_dev_info separately instead of embedding it
inside session. This unifies handling of bdi among users.

CC: Eric Van Hensbergen <ericvh@gmail.com>
CC: Ron Minnich <rminnich@sandia.gov>
CC: Latchesar Ionkov <lucho@ionkov.net>
CC: v9fs-developer@lists.sourceforge.net
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Jan Kara 2017-04-12 12:24:31 +02:00 committed by Jens Axboe
parent 9594caf216
commit 71304feba3
3 changed files with 13 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
fs/9p/v9fs.c
View File

@ -333,10 +333,6 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
goto err_names;
init_rwsem(&v9ses->rename_sem);
rc = bdi_setup_and_register(&v9ses->bdi, "9p");
if (rc)
goto err_names;
v9ses->uid = INVALID_UID;
v9ses->dfltuid = V9FS_DEFUID;
v9ses->dfltgid = V9FS_DEFGID;
@ -345,7 +341,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
if (IS_ERR(v9ses->clnt)) {
rc = PTR_ERR(v9ses->clnt);
p9_debug(P9_DEBUG_ERROR, "problem initializing 9p client\n");
goto err_bdi;
goto err_names;
}
v9ses->flags = V9FS_ACCESS_USER;
@ -415,8 +411,6 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
err_clnt:
p9_client_destroy(v9ses->clnt);
err_bdi:
bdi_destroy(&v9ses->bdi);
err_names:
kfree(v9ses->uname);
kfree(v9ses->aname);
@ -445,8 +439,6 @@ void v9fs_session_close(struct v9fs_session_info *v9ses)
kfree(v9ses->uname);
kfree(v9ses->aname);
bdi_destroy(&v9ses->bdi);
spin_lock(&v9fs_sessionlist_lock);
list_del(&v9ses->slist);
spin_unlock(&v9fs_sessionlist_lock);

1
fs/9p/v9fs.h
View File

@ -114,7 +114,6 @@ struct v9fs_session_info {
kuid_t uid; /* if ACCESS_SINGLE, the uid that has access */
struct p9_client *clnt; /* 9p client */
struct list_head slist; /* list of sessions registered with v9fs */
struct backing_dev_info bdi;
struct rw_semaphore rename_sem;
};

15
fs/9p/vfs_super.c
View File

@ -72,10 +72,12 @@ static int v9fs_set_super(struct super_block *s, void *data)
*
*/
static void
static int
v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
int flags, void *data)
{
int ret;
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_blocksize_bits = fls(v9ses->maxdata - 1);
sb->s_blocksize = 1 << sb->s_blocksize_bits;
@ -85,7 +87,11 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
sb->s_xattr = v9fs_xattr_handlers;
} else
sb->s_op = &v9fs_super_ops;
sb->s_bdi = &v9ses->bdi;
ret = super_setup_bdi(sb);
if (ret)
return ret;
if (v9ses->cache)
sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_SIZE;
@ -99,6 +105,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
#endif
save_mount_options(sb, data);
return 0;
}
/**
@ -138,7 +145,9 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
retval = PTR_ERR(sb);
goto clunk_fid;
}
v9fs_fill_super(sb, v9ses, flags, data);
retval = v9fs_fill_super(sb, v9ses, flags, data);
if (retval)
goto release_sb;
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
sb->s_d_op = &v9fs_cached_dentry_operations;