[PATCH] v9fs: Clean-up vfs_inode and setattr functions
Cleanup code in v9fs vfs_inode as suggested by Alexey Dobriyan. Did some
major revamping of the v9fs setattr code to remove unnecessary allocations and
clean up some dead-code.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index ef78af7..6d2357d 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1,7 +1,7 @@
/*
* linux/fs/9p/vfs_inode.c
*
- * This file contians vfs inode ops for the 9P2000 protocol.
+ * This file contains vfs inode ops for the 9P2000 protocol.
*
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
@@ -54,7 +54,7 @@
*
*/
-static inline int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
+static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
{
int res;
res = mode & 0777;
@@ -92,7 +92,7 @@
*
*/
-static inline int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
+static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
{
int res;
@@ -132,7 +132,7 @@
*
*/
-static inline void
+static void
v9fs_blank_mistat(struct v9fs_session_info *v9ses, struct v9fs_stat *mistat)
{
mistat->type = ~0;
@@ -160,7 +160,7 @@
/**
* v9fs_mistat2unix - convert mistat to unix stat
* @mistat: Plan 9 metadata (mistat) structure
- * @stat: unix metadata (stat) structure to populate
+ * @buf: unix metadata (stat) structure to populate
* @sb: superblock
*
*/
@@ -177,22 +177,11 @@
buf->st_mtime = mistat->mtime;
buf->st_ctime = mistat->mtime;
- if (v9ses && v9ses->extended) {
- /* TODO: string to uid mapping via user-space daemon */
- buf->st_uid = mistat->n_uid;
- buf->st_gid = mistat->n_gid;
-
- sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid);
- sscanf(mistat->gid, "%x", (unsigned int *)&buf->st_gid);
- } else {
- buf->st_uid = v9ses->uid;
- buf->st_gid = v9ses->gid;
- }
-
buf->st_uid = (unsigned short)-1;
buf->st_gid = (unsigned short)-1;
if (v9ses && v9ses->extended) {
+ /* TODO: string to uid mapping via user-space daemon */
if (mistat->n_uid != -1)
sscanf(mistat->uid, "%x", (unsigned int *)&buf->st_uid);
@@ -290,7 +279,7 @@
* @dir: directory inode file is being created in
* @file_dentry: dentry file is being created in
* @perm: permissions file is being created with
- * @open_mode: resulting open mode for file ???
+ * @open_mode: resulting open mode for file
*
*/
@@ -434,9 +423,9 @@
/**
* v9fs_remove - helper function to remove files and directories
- * @inode: directory inode that is being deleted
- * @dentry: dentry that is being deleted
- * @rmdir: where we are a file or a directory
+ * @dir: directory inode that is being deleted
+ * @file: dentry that is being deleted
+ * @rmdir: removing a directory
*
*/
@@ -502,7 +491,7 @@
/**
* v9fs_vfs_mkdir - VFS mkdir hook to create a directory
- * @i: inode that is being unlinked
+ * @inode: inode that is being unlinked
* @dentry: dentry that is being unlinked
* @mode: mode for new directory
*
@@ -624,7 +613,7 @@
/**
* v9fs_vfs_unlink - VFS unlink hook to delete an inode
* @i: inode that is being unlinked
- * @dentry: dentry that is being unlinked
+ * @d: dentry that is being unlinked
*
*/
@@ -636,7 +625,7 @@
/**
* v9fs_vfs_rmdir - VFS unlink hook to delete a directory
* @i: inode that is being unlinked
- * @dentry: dentry that is being unlinked
+ * @d: dentry that is being unlinked
*
*/
@@ -674,6 +663,9 @@
dprintk(DEBUG_VFS, "\n");
+ if (!mistat)
+ return -ENOMEM;
+
if ((!oldfid) || (!olddirfid) || (!newdirfid)) {
dprintk(DEBUG_ERROR, "problem with arguments\n");
return -EBADF;
@@ -771,20 +763,21 @@
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dentry->d_inode);
struct v9fs_fid *fid = v9fs_fid_lookup(dentry, FID_OP);
- struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
struct v9fs_fcall *fcall = NULL;
+ struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
int res = -EPERM;
dprintk(DEBUG_VFS, "\n");
+
+ if (!mistat)
+ return -ENOMEM;
+
if (!fid) {
dprintk(DEBUG_ERROR,
"Couldn't find fid associated with dentry\n");
return -EBADF;
}
- if (!mistat)
- return -ENOMEM;
-
v9fs_blank_mistat(v9ses, mistat);
if (iattr->ia_valid & ATTR_MODE)
mistat->mode = unixmode2p9mode(v9ses, iattr->ia_mode);
@@ -799,72 +792,19 @@
mistat->length = iattr->ia_size;
if (v9ses->extended) {
- char *uid = kmalloc(strlen(mistat->uid), GFP_KERNEL);
- char *gid = kmalloc(strlen(mistat->gid), GFP_KERNEL);
- char *muid = kmalloc(strlen(mistat->muid), GFP_KERNEL);
- char *name = kmalloc(strlen(mistat->name), GFP_KERNEL);
- char *extension = kmalloc(strlen(mistat->extension),
- GFP_KERNEL);
-
- if ((!uid) || (!gid) || (!muid) || (!name) || (!extension)) {
- kfree(uid);
- kfree(gid);
- kfree(muid);
- kfree(name);
- kfree(extension);
-
- return -ENOMEM;
- }
-
- strcpy(uid, mistat->uid);
- strcpy(gid, mistat->gid);
- strcpy(muid, mistat->muid);
- strcpy(name, mistat->name);
- strcpy(extension, mistat->extension);
+ char *ptr = mistat->data+1;
if (iattr->ia_valid & ATTR_UID) {
- if (strlen(uid) != 8) {
- dprintk(DEBUG_ERROR, "uid strlen is %u not 8\n",
- (unsigned int)strlen(uid));
- sprintf(uid, "%08x", iattr->ia_uid);
- } else {
- kfree(uid);
- uid = kmalloc(9, GFP_KERNEL);
- }
-
- sprintf(uid, "%08x", iattr->ia_uid);
+ mistat->uid = ptr;
+ ptr += 1+sprintf(ptr, "%08x", iattr->ia_uid);
mistat->n_uid = iattr->ia_uid;
}
if (iattr->ia_valid & ATTR_GID) {
- if (strlen(gid) != 8)
- dprintk(DEBUG_ERROR, "gid strlen is %u not 8\n",
- (unsigned int)strlen(gid));
- else {
- kfree(gid);
- gid = kmalloc(9, GFP_KERNEL);
- }
-
- sprintf(gid, "%08x", iattr->ia_gid);
+ mistat->gid = ptr;
+ ptr += 1+sprintf(ptr, "%08x", iattr->ia_gid);
mistat->n_gid = iattr->ia_gid;
}
-
- mistat->uid = mistat->data;
- strcpy(mistat->uid, uid);
- mistat->gid = mistat->data + strlen(uid) + 1;
- strcpy(mistat->gid, gid);
- mistat->muid = mistat->gid + strlen(gid) + 1;
- strcpy(mistat->muid, muid);
- mistat->name = mistat->muid + strlen(muid) + 1;
- strcpy(mistat->name, name);
- mistat->extension = mistat->name + strlen(name) + 1;
- strcpy(mistat->extension, extension);
-
- kfree(uid);
- kfree(gid);
- kfree(muid);
- kfree(name);
- kfree(extension);
}
res = v9fs_t_wstat(v9ses, fid->fid, mistat, &fcall);
@@ -985,17 +925,14 @@
int retval = -EPERM;
struct v9fs_fid *newfid;
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
- struct super_block *sb = dir ? dir->i_sb : NULL;
struct v9fs_fcall *fcall = NULL;
struct v9fs_stat *mistat = kmalloc(v9ses->maxdata, GFP_KERNEL);
dprintk(DEBUG_VFS, " %lu,%s,%s\n", dir->i_ino, dentry->d_name.name,
symname);
- if ((!dentry) || (!sb) || (!v9ses)) {
- dprintk(DEBUG_ERROR, "problem with arguments\n");
- return -EBADF;
- }
+ if (!mistat)
+ return -ENOMEM;
if (!v9ses->extended) {
dprintk(DEBUG_ERROR, "not extended\n");
@@ -1040,7 +977,7 @@
/**
* v9fs_readlink - read a symlink's location (internal version)
* @dentry: dentry for symlink
- * @buf: buffer to load symlink location into
+ * @buffer: buffer to load symlink location into
* @buflen: length of buffer
*
*/
@@ -1179,7 +1116,7 @@
* v9fs_vfs_link - create a hardlink
* @old_dentry: dentry for file to link to
* @dir: inode destination for new link
- * @new_dentry: dentry for link
+ * @dentry: dentry for link
*
*/
@@ -1274,6 +1211,9 @@
dprintk(DEBUG_VFS, " %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
+ if (!mistat)
+ return -ENOMEM;
+
if (!new_valid_dev(rdev)) {
retval = -EINVAL;
goto FreeMem;
@@ -1302,7 +1242,8 @@
sprintf(symname, "b %u %u", MAJOR(rdev), MINOR(rdev));
else if (S_ISCHR(mode))
sprintf(symname, "c %u %u", MAJOR(rdev), MINOR(rdev));
- else if (S_ISFIFO(mode)) ; /* DO NOTHING */
+ else if (S_ISFIFO(mode))
+ ; /* DO NOTHING */
else {
retval = -EINVAL;
goto FreeMem;
@@ -1319,8 +1260,6 @@
FCALL_ERROR(fcall));
goto FreeMem;
}
-
- kfree(fcall);
}
/* need to update dcache so we show up */