mirror of
https://github.com/followmsi/android_kernel_google_msm.git
synced 2024-11-06 23:17:41 +00:00
[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>
This commit is contained in:
Eric Van Hensbergen
Linus Torvalds
parent
1346f51ede
commit
73c592b9b8
2 changed files with 36 additions and 97 deletions
|
|
@ -139,7 +139,7 @@ static struct errormap errmap[] = {
|
|||
{"illegal mode", EINVAL},
|
||||
{"illegal name", ENAMETOOLONG},
|
||||
{"not a directory", ENOTDIR},
|
||||
{"not a member of proposed group", EINVAL},
|
||||
{"not a member of proposed group", EPERM},
|
||||
{"not owner", EACCES},
|
||||
{"only owner can change group in wstat", EACCES},
|
||||
{"read only file system", EROFS},
|
||||
|
|
|
|||
|
|
@ -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 struct inode_operations v9fs_symlink_inode_operations;
|
|||
*
|
||||
*/
|
||||
|
||||
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 unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
|
|||
*
|
||||
*/
|
||||
|
||||
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 int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
|
|||
*
|
||||
*/
|
||||
|
||||
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_blank_mistat(struct v9fs_session_info *v9ses, struct v9fs_stat *mistat)
|
|||
/**
|
||||
* 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 @@ v9fs_mistat2unix(struct v9fs_stat *mistat, struct stat *buf,
|
|||
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 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
|
|||
* @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_create(struct inode *dir,
|
|||
|
||||
/**
|
||||
* 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_create(struct inode *inode, struct dentry *dentry, int perm,
|
|||
|
||||
/**
|
||||
* 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 @@ static struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
|
|||
/**
|
||||
* 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 @@ static int v9fs_vfs_unlink(struct inode *i, struct dentry *d)
|
|||
/**
|
||||
* 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 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
|
|||
|
||||
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 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
|
|||
{
|
||||
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 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
|
|||
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 @@ v9fs_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
|
|||
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_vfs_symlink(struct inode *dir, struct dentry *dentry, const char *symname)
|
|||
/**
|
||||
* 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 @@ static void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd, void
|
|||
* 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 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
|
|||
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 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
|
|||
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 @@ v9fs_vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t rdev)
|
|||
FCALL_ERROR(fcall));
|
||||
goto FreeMem;
|
||||
}
|
||||
|
||||
kfree(fcall);
|
||||
}
|
||||
|
||||
/* need to update dcache so we show up */
|
||||
|
|
|
|||
Loading…
Reference in a new issue