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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/9p/vfs_dir.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/9p/vfs_dir.c')
-rw-r--r--ANDROID_3.4.5/fs/9p/vfs_dir.c315
1 files changed, 0 insertions, 315 deletions
diff --git a/ANDROID_3.4.5/fs/9p/vfs_dir.c b/ANDROID_3.4.5/fs/9p/vfs_dir.c
deleted file mode 100644
index ff911e77..00000000
--- a/ANDROID_3.4.5/fs/9p/vfs_dir.c
+++ /dev/null
@@ -1,315 +0,0 @@
-/*
- * linux/fs/9p/vfs_dir.c
- *
- * This file contains vfs directory ops for the 9P2000 protocol.
- *
- * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
- * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to:
- * Free Software Foundation
- * 51 Franklin Street, Fifth Floor
- * Boston, MA 02111-1301 USA
- *
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/stat.h>
-#include <linux/string.h>
-#include <linux/sched.h>
-#include <linux/inet.h>
-#include <linux/idr.h>
-#include <linux/slab.h>
-#include <net/9p/9p.h>
-#include <net/9p/client.h>
-
-#include "v9fs.h"
-#include "v9fs_vfs.h"
-#include "fid.h"
-
-/**
- * struct p9_rdir - readdir accounting
- * @mutex: mutex protecting readdir
- * @head: start offset of current dirread buffer
- * @tail: end offset of current dirread buffer
- * @buf: dirread buffer
- *
- * private structure for keeping track of readdir
- * allocated on demand
- */
-
-struct p9_rdir {
- struct mutex mutex;
- int head;
- int tail;
- uint8_t *buf;
-};
-
-/**
- * dt_type - return file type
- * @mistat: mistat structure
- *
- */
-
-static inline int dt_type(struct p9_wstat *mistat)
-{
- unsigned long perm = mistat->mode;
- int rettype = DT_REG;
-
- if (perm & P9_DMDIR)
- rettype = DT_DIR;
- if (perm & P9_DMSYMLINK)
- rettype = DT_LNK;
-
- return rettype;
-}
-
-static void p9stat_init(struct p9_wstat *stbuf)
-{
- stbuf->name = NULL;
- stbuf->uid = NULL;
- stbuf->gid = NULL;
- stbuf->muid = NULL;
- stbuf->extension = NULL;
-}
-
-/**
- * v9fs_alloc_rdir_buf - Allocate buffer used for read and readdir
- * @filp: opened file structure
- * @buflen: Length in bytes of buffer to allocate
- *
- */
-
-static int v9fs_alloc_rdir_buf(struct file *filp, int buflen)
-{
- struct p9_rdir *rdir;
- struct p9_fid *fid;
- int err = 0;
-
- fid = filp->private_data;
- if (!fid->rdir) {
- rdir = kmalloc(sizeof(struct p9_rdir) + buflen, GFP_KERNEL);
-
- if (rdir == NULL) {
- err = -ENOMEM;
- goto exit;
- }
- spin_lock(&filp->f_dentry->d_lock);
- if (!fid->rdir) {
- rdir->buf = (uint8_t *)rdir + sizeof(struct p9_rdir);
- mutex_init(&rdir->mutex);
- rdir->head = rdir->tail = 0;
- fid->rdir = (void *) rdir;
- rdir = NULL;
- }
- spin_unlock(&filp->f_dentry->d_lock);
- kfree(rdir);
- }
-exit:
- return err;
-}
-
-/**
- * v9fs_dir_readdir - read a directory
- * @filp: opened file structure
- * @dirent: directory structure ???
- * @filldir: function to populate directory structure ???
- *
- */
-
-static int v9fs_dir_readdir(struct file *filp, void *dirent, filldir_t filldir)
-{
- int over;
- struct p9_wstat st;
- int err = 0;
- struct p9_fid *fid;
- int buflen;
- int reclen = 0;
- struct p9_rdir *rdir;
-
- p9_debug(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
- fid = filp->private_data;
-
- buflen = fid->clnt->msize - P9_IOHDRSZ;
-
- err = v9fs_alloc_rdir_buf(filp, buflen);
- if (err)
- goto exit;
- rdir = (struct p9_rdir *) fid->rdir;
-
- err = mutex_lock_interruptible(&rdir->mutex);
- if (err)
- return err;
- while (err == 0) {
- if (rdir->tail == rdir->head) {
- err = v9fs_file_readn(filp, rdir->buf, NULL,
- buflen, filp->f_pos);
- if (err <= 0)
- goto unlock_and_exit;
-
- rdir->head = 0;
- rdir->tail = err;
- }
- while (rdir->head < rdir->tail) {
- p9stat_init(&st);
- err = p9stat_read(fid->clnt, rdir->buf + rdir->head,
- rdir->tail - rdir->head, &st);
- if (err) {
- p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
- err = -EIO;
- p9stat_free(&st);
- goto unlock_and_exit;
- }
- reclen = st.size+2;
-
- over = filldir(dirent, st.name, strlen(st.name),
- filp->f_pos, v9fs_qid2ino(&st.qid), dt_type(&st));
-
- p9stat_free(&st);
-
- if (over) {
- err = 0;
- goto unlock_and_exit;
- }
- rdir->head += reclen;
- filp->f_pos += reclen;
- }
- }
-
-unlock_and_exit:
- mutex_unlock(&rdir->mutex);
-exit:
- return err;
-}
-
-/**
- * v9fs_dir_readdir_dotl - read a directory
- * @filp: opened file structure
- * @dirent: buffer to fill dirent structures
- * @filldir: function to populate dirent structures
- *
- */
-static int v9fs_dir_readdir_dotl(struct file *filp, void *dirent,
- filldir_t filldir)
-{
- int over;
- int err = 0;
- struct p9_fid *fid;
- int buflen;
- struct p9_rdir *rdir;
- struct p9_dirent curdirent;
- u64 oldoffset = 0;
-
- p9_debug(P9_DEBUG_VFS, "name %s\n", filp->f_path.dentry->d_name.name);
- fid = filp->private_data;
-
- buflen = fid->clnt->msize - P9_READDIRHDRSZ;
-
- err = v9fs_alloc_rdir_buf(filp, buflen);
- if (err)
- goto exit;
- rdir = (struct p9_rdir *) fid->rdir;
-
- err = mutex_lock_interruptible(&rdir->mutex);
- if (err)
- return err;
-
- while (err == 0) {
- if (rdir->tail == rdir->head) {
- err = p9_client_readdir(fid, rdir->buf, buflen,
- filp->f_pos);
- if (err <= 0)
- goto unlock_and_exit;
-
- rdir->head = 0;
- rdir->tail = err;
- }
-
- while (rdir->head < rdir->tail) {
-
- err = p9dirent_read(fid->clnt, rdir->buf + rdir->head,
- rdir->tail - rdir->head,
- &curdirent);
- if (err < 0) {
- p9_debug(P9_DEBUG_VFS, "returned %d\n", err);
- err = -EIO;
- goto unlock_and_exit;
- }
-
- /* d_off in dirent structure tracks the offset into
- * the next dirent in the dir. However, filldir()
- * expects offset into the current dirent. Hence
- * while calling filldir send the offset from the
- * previous dirent structure.
- */
- over = filldir(dirent, curdirent.d_name,
- strlen(curdirent.d_name),
- oldoffset, v9fs_qid2ino(&curdirent.qid),
- curdirent.d_type);
- oldoffset = curdirent.d_off;
-
- if (over) {
- err = 0;
- goto unlock_and_exit;
- }
-
- filp->f_pos = curdirent.d_off;
- rdir->head += err;
- }
- }
-
-unlock_and_exit:
- mutex_unlock(&rdir->mutex);
-exit:
- return err;
-}
-
-
-/**
- * v9fs_dir_release - close a directory
- * @inode: inode of the directory
- * @filp: file pointer to a directory
- *
- */
-
-int v9fs_dir_release(struct inode *inode, struct file *filp)
-{
- struct p9_fid *fid;
-
- fid = filp->private_data;
- p9_debug(P9_DEBUG_VFS, "inode: %p filp: %p fid: %d\n",
- inode, filp, fid ? fid->fid : -1);
- if (fid)
- p9_client_clunk(fid);
- return 0;
-}
-
-const struct file_operations v9fs_dir_operations = {
- .read = generic_read_dir,
- .llseek = generic_file_llseek,
- .readdir = v9fs_dir_readdir,
- .open = v9fs_file_open,
- .release = v9fs_dir_release,
-};
-
-const struct file_operations v9fs_dir_operations_dotl = {
- .read = generic_read_dir,
- .llseek = generic_file_llseek,
- .readdir = v9fs_dir_readdir_dotl,
- .open = v9fs_file_open,
- .release = v9fs_dir_release,
- .fsync = v9fs_file_fsync_dotl,
-};