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fs/9p: Expand setup of writeback cache to all levels

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If cache is enabled, make sure we are putting the right things
in place (mainly impacts mmap).  This also sets us up for more
cache levels.

Signed-off-by: Eric Van Hensbergen <ericvh@kernel.org>
Reviewed-by: Dominique Martinet <asmadeus@codewreck.org>
This commit is contained in:
Eric Van Hensbergen 2022-12-08 02:03:32 +00:00
parent 2a03472262
commit 344504e912
No known key found for this signature in database
GPG Key ID: 88FFD5FB4A5FFF98
5 changed files with 10 additions and 11 deletions
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2
fs/9p/v9fs.c
View File

@ -468,7 +468,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
#ifdef CONFIG_9P_FSCACHE
/* register the session for caching */
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
if (v9ses->cache == CACHE_FSCACHE) {
rc = v9fs_cache_session_get_cookie(v9ses, dev_name);
if (rc < 0)
goto err_clnt;

2
fs/9p/vfs_addr.c
View File

@ -279,8 +279,6 @@ static int v9fs_write_begin(struct file *filp, struct address_space *mapping,
p9_debug(P9_DEBUG_VFS, "filp %p, mapping %p\n", filp, mapping);
BUG_ON(!v9inode->writeback_fid);
/* Prefetch area to be written into the cache if we're caching this
* file. We need to do this before we get a lock on the page in case
* there's more than one writer competing for the same cache block.

7
fs/9p/vfs_file.c
View File

@ -73,8 +73,7 @@ int v9fs_file_open(struct inode *inode, struct file *file)
}
mutex_lock(&v9inode->v_mutex);
if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
!v9inode->writeback_fid &&
if ((v9ses->cache) && !v9inode->writeback_fid &&
((file->f_flags & O_ACCMODE) != O_RDONLY)) {
/*
* clone a fid and add it to writeback_fid
@ -92,9 +91,11 @@ int v9fs_file_open(struct inode *inode, struct file *file)
v9inode->writeback_fid = (void *) writeback_fid;
}
mutex_unlock(&v9inode->v_mutex);
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache == CACHE_FSCACHE)
fscache_use_cookie(v9fs_inode_cookie(v9inode),
file->f_mode & FMODE_WRITE);
#endif
v9fs_open_fid_add(inode, &fid);
return 0;
out_error:

3
fs/9p/vfs_inode.c
View File

@ -843,8 +843,7 @@ v9fs_vfs_atomic_open(struct inode *dir, struct dentry *dentry,
inode = d_inode(dentry);
v9inode = V9FS_I(inode);
mutex_lock(&v9inode->v_mutex);
if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
!v9inode->writeback_fid &&
if ((v9ses->cache) && !v9inode->writeback_fid &&
((flags & O_ACCMODE) != O_RDONLY)) {
/*
* clone a fid and add it to writeback_fid

7
fs/9p/vfs_inode_dotl.c
View File

@ -316,8 +316,7 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
v9inode = V9FS_I(inode);
mutex_lock(&v9inode->v_mutex);
if ((v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) &&
!v9inode->writeback_fid &&
if ((v9ses->cache) && !v9inode->writeback_fid &&
((flags & O_ACCMODE) != O_RDONLY)) {
/*
* clone a fid and add it to writeback_fid
@ -340,9 +339,11 @@ v9fs_vfs_atomic_open_dotl(struct inode *dir, struct dentry *dentry,
if (err)
goto out;
file->private_data = ofid;
if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
#ifdef CONFIG_9P_FSCACHE
if (v9ses->cache == CACHE_FSCACHE)
fscache_use_cookie(v9fs_inode_cookie(v9inode),
file->f_mode & FMODE_WRITE);
#endif
v9fs_open_fid_add(inode, &ofid);
file->f_mode |= FMODE_CREATED;
out: