diff --git a/Documentation/filesystems/00-INDEX b/Documentation/filesystems/00-INDEX
index 4dc28cc935037c3b9c8f7cdc4dbb26854fbc2ea8..571785887a4f46e2341051388cc51d8dbb5cc8d7 100644
--- a/Documentation/filesystems/00-INDEX
+++ b/Documentation/filesystems/00-INDEX
@@ -4,6 +4,8 @@ Exporting
- explanation of how to make filesystems exportable.
Locking
- info on locking rules as they pertain to Linux VFS.
+9p.txt
+ - 9p (v9fs) is an implementation of the Plan 9 remote fs protocol.
adfs.txt
- info and mount options for the Acorn Advanced Disc Filing System.
afs.txt
@@ -82,8 +84,6 @@ udf.txt
- info and mount options for the UDF filesystem.
ufs.txt
- info on the ufs filesystem.
-v9fs.txt
- - v9fs is a Unix implementation of the Plan 9 9p remote fs protocol.
vfat.txt
- info on using the VFAT filesystem used in Windows NT and Windows 95
vfs.txt
diff --git a/Documentation/filesystems/9p.txt b/Documentation/filesystems/9p.txt
index 4d075a4558f9d8ad61799cfcf6028edd497a59b3..bbd8b28c13de917dc3bdc6d04b1bc38e9aea2768 100644
--- a/Documentation/filesystems/9p.txt
+++ b/Documentation/filesystems/9p.txt
@@ -40,6 +40,10 @@ OPTIONS
aname=name aname specifies the file tree to access when the server is
offering several exported file systems.
+ cache=mode specifies a cacheing policy. By default, no caches are used.
+ loose = no attempts are made at consistency,
+ intended for exclusive, read-only mounts
+
debug=n specifies debug level. The debug level is a bitmask.
0x01 = display verbose error messages
0x02 = developer debug (DEBUG_CURRENT)
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index a9b6301a04fcce2d0c5302ecfbb66a0de9cf8770..90419715c7e95cc52187d5b362967b0c1d8e0e4d 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -136,7 +136,8 @@ struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry)
}
/**
- * v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and release it
+ * v9fs_fid_clone - lookup the fid for a dentry, clone a private copy and
+ * release it
* @dentry: dentry to look for fid in
*
* find a fid in the dentry and then clone to a new private fid
diff --git a/fs/9p/mux.c b/fs/9p/mux.c
index 147ceef8e5370ad3a57c3b87c027bcb08d95bbac..c783874a9cafb3b55080d99eed02ce03c4b4b148 100644
--- a/fs/9p/mux.c
+++ b/fs/9p/mux.c
@@ -256,7 +256,7 @@ static void v9fs_mux_poll_stop(struct v9fs_mux_data *m)
vpt->muxnum--;
if (!vpt->muxnum) {
dprintk(DEBUG_MUX, "destroy proc %p\n", vpt);
- send_sig(SIGKILL, vpt->task, 1);
+ kthread_stop(vpt->task);
vpt->task = NULL;
v9fs_mux_poll_task_num--;
}
@@ -438,11 +438,8 @@ static int v9fs_poll_proc(void *a)
vpt = a;
dprintk(DEBUG_MUX, "start %p %p\n", current, vpt);
- allow_signal(SIGKILL);
while (!kthread_should_stop()) {
set_current_state(TASK_INTERRUPTIBLE);
- if (signal_pending(current))
- break;
list_for_each_entry_safe(m, mtmp, &vpt->mux_list, mux_list) {
v9fs_poll_mux(m);
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index d9b561ba5e581cfeda7728e8c072428d40a85433..6ad6f192b6e45db7c66df77a170779512c34c29f 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -53,6 +53,8 @@ enum {
Opt_uname, Opt_remotename,
/* Options that take no arguments */
Opt_legacy, Opt_nodevmap, Opt_unix, Opt_tcp, Opt_fd,
+ /* Cache options */
+ Opt_cache_loose,
/* Error token */
Opt_err
};
@@ -76,6 +78,8 @@ static match_table_t tokens = {
{Opt_fd, "fd"},
{Opt_legacy, "noextend"},
{Opt_nodevmap, "nodevmap"},
+ {Opt_cache_loose, "cache=loose"},
+ {Opt_cache_loose, "loose"},
{Opt_err, NULL}
};
@@ -106,6 +110,7 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
v9ses->debug = 0;
v9ses->rfdno = ~0;
v9ses->wfdno = ~0;
+ v9ses->cache = 0;
if (!options)
return;
@@ -121,7 +126,6 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
"integer field, but no integer?\n");
continue;
}
-
}
switch (token) {
case Opt_port:
@@ -169,6 +173,9 @@ static void v9fs_parse_options(char *options, struct v9fs_session_info *v9ses)
case Opt_nodevmap:
v9ses->nodev = 1;
break;
+ case Opt_cache_loose:
+ v9ses->cache = CACHE_LOOSE;
+ break;
default:
continue;
}
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index c134d104cb28f56b606d51886a7e34f93f02c378..820bf5ca35d88b8dd2c03ac619b88b16d8ac45c2 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -47,7 +47,7 @@ struct v9fs_session_info {
unsigned int afid; /* authentication fid */
unsigned int rfdno; /* read file descriptor number */
unsigned int wfdno; /* write file descriptor number */
-
+ unsigned int cache; /* cache mode */
char *name; /* user name to mount as */
char *remotename; /* name of remote hierarchy being mounted */
@@ -73,6 +73,13 @@ enum {
PROTO_FD,
};
+/* possible values of ->cache */
+/* eventually support loose, tight, time, session, default always none */
+enum {
+ CACHE_NONE, /* default */
+ CACHE_LOOSE, /* no consistency */
+};
+
extern struct dentry *v9fs_debugfs_root;
int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 450b0c1b385e62f31db2d74ce6990fd67f8aeedc..8ada4c5c5d70b47abf82297ec8337c9bcb403e98 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -40,8 +40,10 @@
extern struct file_system_type v9fs_fs_type;
extern const struct address_space_operations v9fs_addr_operations;
extern const struct file_operations v9fs_file_operations;
+extern const struct file_operations v9fs_cached_file_operations;
extern const struct file_operations v9fs_dir_operations;
extern struct dentry_operations v9fs_dentry_operations;
+extern struct dentry_operations v9fs_cached_dentry_operations;
struct inode *v9fs_get_inode(struct super_block *sb, int mode);
ino_t v9fs_qid2ino(struct v9fs_qid *qid);
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index cc24abf232d5818c375836b744759916b88f24ac..bed48fa96521862d6aa26d503df589bbc4993bdd 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -63,6 +63,8 @@ static int v9fs_vfs_readpage(struct file *filp, struct page *page)
int total = 0;
int result = 0;
+ dprintk(DEBUG_VFS, "\n");
+
buffer = kmap(page);
do {
if (count < rsize)
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index 062daa6000ab55a33441b8bcac7aa4375727fe14..ddffd8aa902d65d1c389fc3a86d845ca62238210 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -53,9 +53,30 @@
static int v9fs_dentry_delete(struct dentry *dentry)
{
dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+
return 1;
}
+/**
+ * v9fs_cached_dentry_delete - called when dentry refcount equals 0
+ * @dentry: dentry in question
+ *
+ * Only return 1 if our inode is invalid. Only non-synthetic files
+ * (ones without mtime == 0) should be calling this function.
+ *
+ */
+
+static int v9fs_cached_dentry_delete(struct dentry *dentry)
+{
+ struct inode *inode = dentry->d_inode;
+ dprintk(DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_iname, dentry);
+
+ if(!inode)
+ return 1;
+
+ return 0;
+}
+
/**
* v9fs_dentry_release - called when dentry is going to be freed
* @dentry: dentry that is being release
@@ -87,6 +108,11 @@ void v9fs_dentry_release(struct dentry *dentry)
}
}
+struct dentry_operations v9fs_cached_dentry_operations = {
+ .d_delete = v9fs_cached_dentry_delete,
+ .d_release = v9fs_dentry_release,
+};
+
struct dentry_operations v9fs_dentry_operations = {
.d_delete = v9fs_dentry_delete,
.d_release = v9fs_dentry_release,
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 6c78343cf69023e5220c6a50127b33325c0f1c97..653dfa5b253174bcf4712211ece50540beed06e8 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -79,6 +79,13 @@ int v9fs_file_open(struct inode *inode, struct file *file)
vfid->filp = file;
kfree(fcall);
+ if((vfid->qid.version) && (v9ses->cache)) {
+ dprintk(DEBUG_VFS, "cached");
+ /* enable cached file options */
+ if(file->f_op == &v9fs_file_operations)
+ file->f_op = &v9fs_cached_file_operations;
+ }
+
return 0;
Clunk_Fid:
@@ -238,6 +245,17 @@ v9fs_file_write(struct file *filp, const char __user * data,
return total;
}
+const struct file_operations v9fs_cached_file_operations = {
+ .llseek = generic_file_llseek,
+ .read = do_sync_read,
+ .aio_read = generic_file_aio_read,
+ .write = v9fs_file_write,
+ .open = v9fs_file_open,
+ .release = v9fs_dir_release,
+ .lock = v9fs_file_lock,
+ .mmap = generic_file_mmap,
+};
+
const struct file_operations v9fs_file_operations = {
.llseek = generic_file_llseek,
.read = v9fs_file_read,
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 5cf22134826bded20a24b57be206f2ff3624f3b4..124a085d1f2e16265da9658cb339bbfb87e15287 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -504,7 +504,10 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
goto error;
}
- dentry->d_op = &v9fs_dentry_operations;
+ if(v9ses->cache)
+ dentry->d_op = &v9fs_cached_dentry_operations;
+ else
+ dentry->d_op = &v9fs_dentry_operations;
d_instantiate(dentry, inode);
if (nd && nd->flags & LOOKUP_OPEN) {
@@ -589,7 +592,10 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
goto error;
}
- dentry->d_op = &v9fs_dentry_operations;
+ if(v9ses->cache)
+ dentry->d_op = &v9fs_cached_dentry_operations;
+ else
+ dentry->d_op = &v9fs_dentry_operations;
d_instantiate(dentry, inode);
return 0;
@@ -626,7 +632,6 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
sb = dir->i_sb;
v9ses = v9fs_inode2v9ses(dir);
- dentry->d_op = &v9fs_dentry_operations;
dirfid = v9fs_fid_lookup(dentry->d_parent);
if(IS_ERR(dirfid))
@@ -697,6 +702,10 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
fid->qid = fcall->params.rstat.stat.qid;
v9fs_stat2inode(&fcall->params.rstat.stat, inode, inode->i_sb);
+ if((fid->qid.version)&&(v9ses->cache))
+ dentry->d_op = &v9fs_cached_dentry_operations;
+ else
+ dentry->d_op = &v9fs_dentry_operations;
d_add(dentry, inode);
kfree(fcall);
@@ -1184,7 +1193,10 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
goto free_vfid;
}
- dentry->d_op = &v9fs_dentry_operations;
+ if(v9ses->cache)
+ dentry->d_op = &v9fs_cached_dentry_operations;
+ else
+ dentry->d_op = &v9fs_dentry_operations;
d_instantiate(dentry, inode);
return 0;