Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

[safe/jmp/linux-2.6] / fs / 9p / vfs_file.c

diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 4d6d765..25b300e 100644 (file)
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -32,6 +32,7 @@
 #include <linux/string.h>
 #include <linux/inet.h>
 #include <linux/list.h>
+#include <linux/pagemap.h>
 #include <asm/uaccess.h>
 #include <linux/idr.h>
 #include <net/9p/9p.h>
@@ -40,6 +41,7 @@
 #include "v9fs.h"
 #include "v9fs_vfs.h"
 #include "fid.h"
+#include "cache.h"
 
 static const struct file_operations v9fs_cached_file_operations;
 
@@ -59,7 +61,7 @@ int v9fs_file_open(struct inode *inode, struct file *file)
 
        P9_DPRINTK(P9_DEBUG_VFS, "inode: %p file: %p \n", inode, file);
        v9ses = v9fs_inode2v9ses(inode);
-       omode = v9fs_uflags2omode(file->f_flags, v9fs_extended(v9ses));
+       omode = v9fs_uflags2omode(file->f_flags, v9fs_proto_dotu(v9ses));
        fid = file->private_data;
        if (!fid) {
                fid = v9fs_fid_clone(file->f_path.dentry);
@@ -72,10 +74,10 @@ int v9fs_file_open(struct inode *inode, struct file *file)
                        return err;
                }
                if (omode & P9_OTRUNC) {
-                       inode->i_size = 0;
+                       i_size_write(inode, 0);
                        inode->i_blocks = 0;
                }
-               if ((file->f_flags & O_APPEND) && (!v9fs_extended(v9ses)))
+               if ((file->f_flags & O_APPEND) && (!v9fs_proto_dotu(v9ses)))
                        generic_file_llseek(file, 0, SEEK_END);
        }
 
@@ -85,6 +87,10 @@ int v9fs_file_open(struct inode *inode, struct file *file)
                /* enable cached file options */
                if(file->f_op == &v9fs_file_operations)
                        file->f_op = &v9fs_cached_file_operations;
+
+#ifdef CONFIG_9P_FSCACHE
+               v9fs_cache_inode_set_cookie(inode, file);
+#endif
        }
 
        return 0;
@@ -108,7 +114,7 @@ static int v9fs_file_lock(struct file *filp, int cmd, struct file_lock *fl)
        P9_DPRINTK(P9_DEBUG_VFS, "filp: %p lock: %p\n", filp, fl);
 
        /* No mandatory locks */
-       if (__mandatory_lock(inode))
+       if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
                return -ENOLCK;
 
        if ((IS_SETLK(cmd) || IS_SETLKW(cmd)) && fl->fl_type != F_UNLCK) {
@@ -136,7 +142,7 @@ v9fs_file_readn(struct file *filp, char *data, char __user *udata, u32 count,
        int n, total;
        struct p9_fid *fid = filp->private_data;
 
-       P9_DPRINTK(P9_DEBUG_9P, "fid %d offset %llu count %d\n", fid->fid,
+       P9_DPRINTK(P9_DEBUG_VFS, "fid %d offset %llu count %d\n", fid->fid,
                                        (long long unsigned) offset, count);
 
        n = 0;
@@ -178,7 +184,7 @@ v9fs_file_read(struct file *filp, char __user *udata, size_t count,
        int ret;
        struct p9_fid *fid;
 
-       P9_DPRINTK(P9_DEBUG_VFS, "count %d offset %lld\n", count, *offset);
+       P9_DPRINTK(P9_DEBUG_VFS, "count %zu offset %lld\n", count, *offset);
        fid = filp->private_data;
 
        if (count > (fid->clnt->msize - P9_IOHDRSZ))
@@ -205,27 +211,67 @@ static ssize_t
 v9fs_file_write(struct file *filp, const char __user * data,
                size_t count, loff_t * offset)
 {
-       int ret;
+       int n, rsize, total = 0;
        struct p9_fid *fid;
+       struct p9_client *clnt;
        struct inode *inode = filp->f_path.dentry->d_inode;
+       loff_t origin = *offset;
+       unsigned long pg_start, pg_end;
 
        P9_DPRINTK(P9_DEBUG_VFS, "data %p count %d offset %x\n", data,
                (int)count, (int)*offset);
 
        fid = filp->private_data;
-       ret = p9_client_write(fid, NULL, data, *offset, count);
-       if (ret > 0) {
-               invalidate_inode_pages2_range(inode->i_mapping, *offset,
-                                                               *offset+ret);
-               *offset += ret;
-       }
+       clnt = fid->clnt;
 
-       if (*offset > inode->i_size) {
-               inode->i_size = *offset;
-               inode->i_blocks = (inode->i_size + 512 - 1) >> 9;
+       rsize = fid->iounit;
+       if (!rsize || rsize > clnt->msize-P9_IOHDRSZ)
+               rsize = clnt->msize - P9_IOHDRSZ;
+
+       do {
+               if (count < rsize)
+                       rsize = count;
+
+               n = p9_client_write(fid, NULL, data+total, origin+total,
+                                                                       rsize);
+               if (n <= 0)
+                       break;
+               count -= n;
+               total += n;
+       } while (count > 0);
+
+       if (total > 0) {
+               pg_start = origin >> PAGE_CACHE_SHIFT;
+               pg_end = (origin + total - 1) >> PAGE_CACHE_SHIFT;
+               if (inode->i_mapping && inode->i_mapping->nrpages)
+                       invalidate_inode_pages2_range(inode->i_mapping,
+                                                     pg_start, pg_end);
+               *offset += total;
+               i_size_write(inode, i_size_read(inode) + total);
+               inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
        }
 
-       return ret;
+       if (n < 0)
+               return n;
+
+       return total;
+}
+
+static int v9fs_file_fsync(struct file *filp, struct dentry *dentry,
+                                       int datasync)
+{
+       struct p9_fid *fid;
+       struct p9_wstat wstat;
+       int retval;
+
+       P9_DPRINTK(P9_DEBUG_VFS, "filp %p dentry %p datasync %x\n", filp,
+                                               dentry, datasync);
+
+       fid = filp->private_data;
+       v9fs_blank_wstat(&wstat);
+
+       retval = p9_client_wstat(fid, &wstat);
+       return retval;
 }
 
 static const struct file_operations v9fs_cached_file_operations = {
@@ -237,6 +283,7 @@ static const struct file_operations v9fs_cached_file_operations = {
        .release = v9fs_dir_release,
        .lock = v9fs_file_lock,
        .mmap = generic_file_readonly_mmap,
+       .fsync = v9fs_file_fsync,
 };
 
 const struct file_operations v9fs_file_operations = {
@@ -247,4 +294,16 @@ const struct file_operations v9fs_file_operations = {
        .release = v9fs_dir_release,
        .lock = v9fs_file_lock,
        .mmap = generic_file_readonly_mmap,
+       .fsync = v9fs_file_fsync,
+};
+
+const struct file_operations v9fs_file_operations_dotl = {
+       .llseek = generic_file_llseek,
+       .read = v9fs_file_read,
+       .write = v9fs_file_write,
+       .open = v9fs_file_open,
+       .release = v9fs_dir_release,
+       .lock = v9fs_file_lock,
+       .mmap = generic_file_readonly_mmap,
+       .fsync = v9fs_file_fsync,
 };