Merge branch 'iommu/largepages' into amd-iommu/2.6.35

[karo-tx-linux.git] / fs / 9p / vfs_inode.c

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index a407fa3388c0c560a7ff754066dfa9606380bef5..f2434fc9d2c44f620e2e579a19318321e12d6e71 100644 (file)
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -34,6 +34,7 @@
 #include <linux/namei.h>
 #include <linux/idr.h>
 #include <linux/sched.h>
+#include <linux/slab.h>
 #include <net/9p/9p.h>
 #include <net/9p/client.h>
 
@@ -60,7 +61,7 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
        res = mode & 0777;
        if (S_ISDIR(mode))
                res |= P9_DMDIR;
-       if (v9fs_extended(v9ses)) {
+       if (v9fs_proto_dotu(v9ses)) {
                if (S_ISLNK(mode))
                        res |= P9_DMSYMLINK;
                if (v9ses->nodev == 0) {
@@ -102,21 +103,21 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
 
        if ((mode & P9_DMDIR) == P9_DMDIR)
                res |= S_IFDIR;
-       else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses)))
+       else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
                res |= S_IFLNK;
-       else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses))
+       else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
                 && (v9ses->nodev == 0))
                res |= S_IFSOCK;
-       else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses))
+       else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
                 && (v9ses->nodev == 0))
                res |= S_IFIFO;
-       else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses))
+       else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
                 && (v9ses->nodev == 0))
                res |= S_IFBLK;
        else
                res |= S_IFREG;
 
-       if (v9fs_extended(v9ses)) {
+       if (v9fs_proto_dotu(v9ses)) {
                if ((mode & P9_DMSETUID) == P9_DMSETUID)
                        res |= S_ISUID;
 
@@ -265,7 +266,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
        case S_IFBLK:
        case S_IFCHR:
        case S_IFSOCK:
-               if (!v9fs_extended(v9ses)) {
+               if (!v9fs_proto_dotu(v9ses)) {
                        P9_DPRINTK(P9_DEBUG_ERROR,
                                   "special files without extended mode\n");
                        err = -EINVAL;
@@ -278,7 +279,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
                inode->i_fop = &v9fs_file_operations;
                break;
        case S_IFLNK:
-               if (!v9fs_extended(v9ses)) {
+               if (!v9fs_proto_dotu(v9ses)) {
                        P9_DPRINTK(P9_DEBUG_ERROR,
                                   "extended modes used w/o 9P2000.u\n");
                        err = -EINVAL;
@@ -288,7 +289,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
                break;
        case S_IFDIR:
                inc_nlink(inode);
-               if (v9fs_extended(v9ses))
+               if (v9fs_proto_dotu(v9ses))
                        inode->i_op = &v9fs_dir_inode_operations_ext;
                else
                        inode->i_op = &v9fs_dir_inode_operations;
@@ -431,6 +432,7 @@ error:
 
 static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
 {
+       int retval;
        struct inode *file_inode;
        struct v9fs_session_info *v9ses;
        struct p9_fid *v9fid;
@@ -444,7 +446,10 @@ static int v9fs_remove(struct inode *dir, struct dentry *file, int rmdir)
        if (IS_ERR(v9fid))
                return PTR_ERR(v9fid);
 
-       return p9_client_remove(v9fid);
+       retval = p9_client_remove(v9fid);
+       if (!retval)
+               drop_nlink(file_inode);
+       return retval;
 }
 
 static int
@@ -575,7 +580,8 @@ v9fs_vfs_create(struct inode *dir, struct dentry *dentry, int mode,
                flags = O_RDWR;
 
        fid = v9fs_create(v9ses, dir, dentry, NULL, perm,
-                               v9fs_uflags2omode(flags, v9fs_extended(v9ses)));
+                               v9fs_uflags2omode(flags,
+                                               v9fs_proto_dotu(v9ses)));
        if (IS_ERR(fid)) {
                err = PTR_ERR(fid);
                fid = NULL;
@@ -655,6 +661,9 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
        P9_DPRINTK(P9_DEBUG_VFS, "dir: %p dentry: (%s) %p nameidata: %p\n",
                dir, dentry->d_name.name, dentry, nameidata);
 
+       if (dentry->d_name.len > NAME_MAX)
+               return ERR_PTR(-ENAMETOOLONG);
+
        sb = dir->i_sb;
        v9ses = v9fs_inode2v9ses(dir);
        dfid = v9fs_fid_lookup(dentry->d_parent);
@@ -858,7 +867,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
        if (iattr->ia_valid & ATTR_SIZE)
                wstat.length = iattr->ia_size;
 
-       if (v9fs_extended(v9ses)) {
+       if (v9fs_proto_dotu(v9ses)) {
                if (iattr->ia_valid & ATTR_UID)
                        wstat.n_uid = iattr->ia_uid;
 
@@ -886,6 +895,8 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
        struct super_block *sb)
 {
        char ext[32];
+       char tag_name[14];
+       unsigned int i_nlink;
        struct v9fs_session_info *v9ses = sb->s_fs_info;
 
        inode->i_nlink = 1;
@@ -897,11 +908,26 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
        inode->i_uid = v9ses->dfltuid;
        inode->i_gid = v9ses->dfltgid;
 
-       if (v9fs_extended(v9ses)) {
+       if (v9fs_proto_dotu(v9ses)) {
                inode->i_uid = stat->n_uid;
                inode->i_gid = stat->n_gid;
        }
-
+       if ((S_ISREG(inode->i_mode)) || (S_ISDIR(inode->i_mode))) {
+               if (v9fs_proto_dotu(v9ses) && (stat->extension[0] != '\0')) {
+                       /*
+                        * Hadlink support got added later to
+                        * to the .u extension. So there can be
+                        * server out there that doesn't support
+                        * this even with .u extension. So check
+                        * for non NULL stat->extension
+                        */
+                       strncpy(ext, stat->extension, sizeof(ext));
+                       /* HARDLINKCOUNT %u */
+                       sscanf(ext, "%13s %u", tag_name, &i_nlink);
+                       if (!strncmp(tag_name, "HARDLINKCOUNT", 13))
+                               inode->i_nlink = i_nlink;
+               }
+       }
        inode->i_mode = p9mode2unixmode(v9ses, stat->mode);
        if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode))) {
                char type = 0;
@@ -976,7 +1002,7 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
        if (IS_ERR(fid))
                return PTR_ERR(fid);
 
-       if (!v9fs_extended(v9ses))
+       if (!v9fs_proto_dotu(v9ses))
                return -EBADF;
 
        st = p9_client_stat(fid);
@@ -1066,7 +1092,7 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
        struct p9_fid *fid;
 
        v9ses = v9fs_inode2v9ses(dir);
-       if (!v9fs_extended(v9ses)) {
+       if (!v9fs_proto_dotu(v9ses)) {
                P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
                return -EPERM;
        }