diff options
| -rw-r--r-- | Documentation/filesystems/00-INDEX | 4 | ||||
| -rw-r--r-- | Documentation/filesystems/9p.txt | 4 | ||||
| -rw-r--r-- | fs/9p/fid.c | 3 | ||||
| -rw-r--r-- | fs/9p/mux.c | 5 | ||||
| -rw-r--r-- | fs/9p/v9fs.c | 9 | ||||
| -rw-r--r-- | fs/9p/v9fs.h | 9 | ||||
| -rw-r--r-- | fs/9p/v9fs_vfs.h | 2 | ||||
| -rw-r--r-- | fs/9p/vfs_addr.c | 2 | ||||
| -rw-r--r-- | fs/9p/vfs_dentry.c | 26 | ||||
| -rw-r--r-- | fs/9p/vfs_file.c | 18 | ||||
| -rw-r--r-- | fs/9p/vfs_inode.c | 20 |
11 files changed, 89 insertions, 13 deletions
diff --git a/Documentation/filesystems/00-INDEX b/Documentation/filesystems/00-INDEX index 4dc28cc93503..571785887a4f 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 4d075a4558f9..bbd8b28c13de 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 a9b6301a04fc..90419715c7e9 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 147ceef8e537..c783874a9caf 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 d9b561ba5e58..6ad6f192b6e4 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 c134d104cb28..820bf5ca35d8 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 450b0c1b385e..8ada4c5c5d70 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 cc24abf232d5..bed48fa96521 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 062daa6000ab..ddffd8aa902d 100644 --- a/fs/9p/vfs_dentry.c +++ b/fs/9p/vfs_dentry.c @@ -53,10 +53,31 @@ 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 6c78343cf690..653dfa5b2531 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 5cf22134826b..124a085d1f2e 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; |
