/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/smp_lock.h>
-#include <linux/gfs2_ioctl.h>
#include <linux/fs.h>
-#include <asm/semaphore.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/ext2_fs.h>
+#include <linux/crc32.h>
+#include <linux/iflags.h>
#include <asm/uaccess.h>
#include "gfs2.h"
+#include "lm_interface.h"
+#include "incore.h"
#include "bmap.h"
#include "dir.h"
#include "glock.h"
#include "quota.h"
#include "rgrp.h"
#include "trans.h"
+#include "util.h"
+#include "eaops.h"
/* "bad" is for NFS support */
struct filldir_bad_entry {
void *fdr_opaque;
};
+/*
+ * Most fields left uninitialised to catch anybody who tries to
+ * use them. f_flags set to prevent file_accessed() from touching
+ * any other part of this. Its use is purely as a flag so that we
+ * know (in readpage()) whether or not do to locking.
+ */
+struct file gfs2_internal_file_sentinal = {
+ .f_flags = O_NOATIME|O_RDONLY,
+};
+
static int gfs2_read_actor(read_descriptor_t *desc, struct page *page,
unsigned long offset, unsigned long size)
{
int gfs2_internal_read(struct gfs2_inode *ip, struct file_ra_state *ra_state,
char *buf, loff_t *pos, unsigned size)
{
- struct inode *inode = ip->i_vnode;
+ struct inode *inode = &ip->i_inode;
read_descriptor_t desc;
desc.written = 0;
desc.arg.buf = buf;
desc.count = size;
desc.error = 0;
- do_generic_mapping_read(inode->i_mapping, ra_state, NULL, pos, &desc, gfs2_read_actor);
+ do_generic_mapping_read(inode->i_mapping, ra_state,
+ &gfs2_internal_file_sentinal, pos, &desc,
+ gfs2_read_actor);
return desc.written ? desc.written : desc.error;
}
static loff_t gfs2_llseek(struct file *file, loff_t offset, int origin)
{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
+ struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
struct gfs2_holder i_gh;
loff_t error;
- atomic_inc(&ip->i_sbd->sd_ops_file);
-
if (origin == 2) {
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
&i_gh);
unsigned long nr_segs, loff_t *ppos)
{
struct file *filp = iocb->ki_filp;
- struct gfs2_inode *ip = get_v2ip(filp->f_mapping->host);
+ struct gfs2_inode *ip = GFS2_I(filp->f_mapping->host);
struct gfs2_holder gh;
ssize_t retval;
unsigned long seg;
struct kiocb kiocb;
ssize_t ret;
- atomic_inc(&get_v2sdp(filp->f_mapping->host->i_sb)->sd_ops_file);
-
init_sync_kiocb(&kiocb, filp);
ret = __gfs2_file_aio_read(&kiocb, &local_iov, 1, offset);
if (-EIOCBQUEUED == ret)
struct kiocb kiocb;
ssize_t ret;
- atomic_inc(&get_v2sdp(filp->f_mapping->host->i_sb)->sd_ops_file);
-
init_sync_kiocb(&kiocb, filp);
ret = __gfs2_file_aio_read(&kiocb, iov, nr_segs, ppos);
if (-EIOCBQUEUED == ret)
static ssize_t gfs2_file_aio_read(struct kiocb *iocb, char __user *buf,
size_t count, loff_t pos)
{
- struct file *filp = iocb->ki_filp;
struct iovec local_iov = { .iov_base = buf, .iov_len = count };
- atomic_inc(&get_v2sdp(filp->f_mapping->host->i_sb)->sd_ops_file);
-
BUG_ON(iocb->ki_pos != pos);
return __gfs2_file_aio_read(iocb, &local_iov, 1, &iocb->ki_pos);
}
int error;
error = fdr->fdr_filldir(fdr->fdr_opaque, name, length, offset,
- inum->no_formal_ino, type);
+ inum->no_addr, type);
if (error)
return 1;
static int readdir_reg(struct file *file, void *dirent, filldir_t filldir)
{
- struct gfs2_inode *dip = get_v2ip(file->f_mapping->host);
+ struct inode *dir = file->f_mapping->host;
+ struct gfs2_inode *dip = GFS2_I(dir);
struct filldir_reg fdr;
struct gfs2_holder d_gh;
uint64_t offset = file->f_pos;
int error;
- fdr.fdr_sbd = dip->i_sbd;
+ fdr.fdr_sbd = GFS2_SB(dir);
fdr.fdr_prefetch = 1;
fdr.fdr_filldir = filldir;
fdr.fdr_opaque = dirent;
return error;
}
- error = gfs2_dir_read(dip, &offset, &fdr, filldir_reg_func);
+ error = gfs2_dir_read(dir, &offset, &fdr, filldir_reg_func);
gfs2_glock_dq_uninit(&d_gh);
static int readdir_bad(struct file *file, void *dirent, filldir_t filldir)
{
- struct gfs2_inode *dip = get_v2ip(file->f_mapping->host);
- struct gfs2_sbd *sdp = dip->i_sbd;
+ struct inode *dir = file->f_mapping->host;
+ struct gfs2_inode *dip = GFS2_I(dir);
+ struct gfs2_sbd *sdp = GFS2_SB(dir);
struct filldir_reg fdr;
unsigned int entries, size;
struct filldir_bad *fdb;
goto out;
}
- error = gfs2_dir_read(dip, &offset, fdb, filldir_bad_func);
+ error = gfs2_dir_read(dir, &offset, fdb, filldir_bad_func);
gfs2_glock_dq_uninit(&d_gh);
{
int error;
- atomic_inc(&get_v2sdp(file->f_mapping->host->i_sb)->sd_ops_file);
-
if (strcmp(current->comm, "nfsd") != 0)
error = readdir_reg(file, dirent, filldir);
else
return error;
}
-static int gfs2_ioctl_flags(struct gfs2_inode *ip, unsigned int cmd, unsigned long arg)
+static const u32 iflags_to_gfs2[32] = {
+ [iflag_Sync] = GFS2_DIF_SYNC,
+ [iflag_Immutable] = GFS2_DIF_IMMUTABLE,
+ [iflag_Append] = GFS2_DIF_APPENDONLY,
+ [iflag_NoAtime] = GFS2_DIF_NOATIME,
+ [iflag_Index] = GFS2_DIF_EXHASH,
+ [iflag_JournalData] = GFS2_DIF_JDATA,
+ [iflag_DirectIO] = GFS2_DIF_DIRECTIO,
+};
+
+static const u32 gfs2_to_iflags[32] = {
+ [gfs2fl_Sync] = IFLAG_SYNC,
+ [gfs2fl_Immutable] = IFLAG_IMMUTABLE,
+ [gfs2fl_AppendOnly] = IFLAG_APPEND,
+ [gfs2fl_NoAtime] = IFLAG_NOATIME,
+ [gfs2fl_ExHash] = IFLAG_INDEX,
+ [gfs2fl_Jdata] = IFLAG_JOURNAL_DATA,
+ [gfs2fl_Directio] = IFLAG_DIRECTIO,
+ [gfs2fl_InheritDirectio] = IFLAG_DIRECTIO,
+ [gfs2fl_InheritJdata] = IFLAG_JOURNAL_DATA,
+};
+
+static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
{
- unsigned int lmode = (cmd == GFS2_IOCTL_SETFLAGS) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
- struct buffer_head *dibh;
- struct gfs2_holder i_gh;
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_holder gh;
int error;
- __u32 flags = 0, change;
+ u32 iflags;
- if (cmd == GFS2_IOCTL_SETFLAGS) {
- error = get_user(flags, (__u32 __user *)arg);
- if (error)
- return -EFAULT;
- }
-
- error = gfs2_glock_nq_init(ip->i_gl, lmode, 0, &i_gh);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
+ error = gfs2_glock_nq_m_atime(1, &gh);
if (error)
return error;
+
+ iflags = iflags_cvt(gfs2_to_iflags, ip->i_di.di_flags);
+ if (put_user(iflags, ptr))
+ error = -EFAULT;
- if (cmd == GFS2_IOCTL_SETFLAGS) {
- change = flags ^ ip->i_di.di_flags;
- error = -EPERM;
- if (change & (GFS2_DIF_IMMUTABLE|GFS2_DIF_APPENDONLY)) {
- if (!capable(CAP_LINUX_IMMUTABLE))
- goto out;
- }
- error = -EINVAL;
- if (flags & (GFS2_DIF_JDATA|GFS2_DIF_DIRECTIO)) {
- if (!S_ISREG(ip->i_di.di_mode))
- goto out;
- }
- if (flags & (GFS2_DIF_INHERIT_JDATA|GFS2_DIF_INHERIT_DIRECTIO)) {
- if (!S_ISDIR(ip->i_di.di_mode))
- goto out;
- }
+ gfs2_glock_dq_m(1, &gh);
+ gfs2_holder_uninit(&gh);
+ return error;
+}
- error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
- if (error)
- goto out;
+/* Flags that can be set by user space */
+#define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \
+ GFS2_DIF_DIRECTIO| \
+ GFS2_DIF_IMMUTABLE| \
+ GFS2_DIF_APPENDONLY| \
+ GFS2_DIF_NOATIME| \
+ GFS2_DIF_SYNC| \
+ GFS2_DIF_SYSTEM| \
+ GFS2_DIF_INHERIT_DIRECTIO| \
+ GFS2_DIF_INHERIT_JDATA)
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_trans_end;
+/**
+ * gfs2_set_flags - set flags on an inode
+ * @inode: The inode
+ * @flags: The flags to set
+ * @mask: Indicates which flags are valid
+ *
+ */
+static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
+{
+ struct inode *inode = filp->f_dentry->d_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ struct buffer_head *bh;
+ struct gfs2_holder gh;
+ int error;
+ u32 new_flags, flags;
- ip->i_di.di_flags = flags;
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ if (error) {
+ gfs2_holder_uninit(&gh);
+ return error;
+ }
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
+ flags = ip->i_di.di_flags;
+ new_flags = (flags & ~mask) | (reqflags & mask);
+ if ((new_flags ^ flags) == 0)
+ goto out;
- brelse(dibh);
+ if (S_ISDIR(inode->i_mode)) {
+ if ((new_flags ^ flags) & GFS2_DIF_JDATA)
+ new_flags ^= (GFS2_DIF_JDATA|GFS2_DIF_INHERIT_JDATA);
+ if ((new_flags ^ flags) & GFS2_DIF_DIRECTIO)
+ new_flags ^= (GFS2_DIF_DIRECTIO|GFS2_DIF_INHERIT_DIRECTIO);
+ }
-out_trans_end:
- gfs2_trans_end(ip->i_sbd);
- } else {
- flags = ip->i_di.di_flags;
+ error = -EINVAL;
+ if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
+ goto out;
+
+ error = -EPERM;
+ if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
+ goto out;
+ if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
+ goto out;
+ if (((new_flags ^ flags) & GFS2_DIF_IMMUTABLE) &&
+ !capable(CAP_LINUX_IMMUTABLE))
+ goto out;
+ if (!IS_IMMUTABLE(inode)) {
+ error = permission(inode, MAY_WRITE, NULL);
+ if (error)
+ goto out;
}
+
+ error = gfs2_trans_begin(sdp, RES_DINODE, 0);
+ if (error)
+ goto out;
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ goto out_trans_end;
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ ip->i_di.di_flags = new_flags;
+ gfs2_dinode_out(&ip->i_di, bh->b_data);
+ brelse(bh);
+out_trans_end:
+ gfs2_trans_end(sdp);
out:
- gfs2_glock_dq_uninit(&i_gh);
- if (cmd == GFS2_IOCTL_GETFLAGS) {
- if (put_user(flags, (__u32 __user *)arg))
- return -EFAULT;
- }
+ gfs2_glock_dq_uninit(&gh);
return error;
}
-/**
- * gfs2_ioctl - do an ioctl on a file
- * @inode: the inode
- * @file: the file pointer
- * @cmd: the ioctl command
- * @arg: the argument
- *
- * Returns: errno
- */
-
-static int gfs2_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
{
- struct gfs2_inode *ip = get_v2ip(inode);
-
- atomic_inc(&ip->i_sbd->sd_ops_file);
-
- switch (cmd) {
- case GFS2_IOCTL_SETFLAGS:
- case GFS2_IOCTL_GETFLAGS:
- return gfs2_ioctl_flags(ip, cmd, arg);
+ u32 iflags, gfsflags;
+ if (get_user(iflags, ptr))
+ return -EFAULT;
+ gfsflags = iflags_cvt(iflags_to_gfs2, iflags);
+ return do_gfs2_set_flags(filp, gfsflags, ~0);
+}
- default:
- return -ENOTTY;
+static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ switch(cmd) {
+ case IFLAGS_GET_IOC:
+ return gfs2_get_flags(filp, (u32 __user *)arg);
+ case IFLAGS_SET_IOC:
+ return gfs2_set_flags(filp, (u32 __user *)arg);
}
+ return -ENOTTY;
}
+
/**
* gfs2_mmap -
* @file: The file to map
static int gfs2_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
+ struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
struct gfs2_holder i_gh;
int error;
- atomic_inc(&ip->i_sbd->sd_ops_file);
-
gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
error = gfs2_glock_nq_atime(&i_gh);
if (error) {
static int gfs2_open(struct inode *inode, struct file *file)
{
- struct gfs2_inode *ip = get_v2ip(inode);
+ struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_holder i_gh;
struct gfs2_file *fp;
int error;
- atomic_inc(&ip->i_sbd->sd_ops_file);
-
fp = kzalloc(sizeof(struct gfs2_file), GFP_KERNEL);
if (!fp)
return -ENOMEM;
- init_MUTEX(&fp->f_fl_mutex);
-
- fp->f_inode = ip;
- fp->f_vfile = file;
+ mutex_init(&fp->f_fl_mutex);
- gfs2_assert_warn(ip->i_sbd, !get_v2fp(file));
- set_v2fp(file, fp);
+ gfs2_assert_warn(GFS2_SB(inode), !file->private_data);
+ file->private_data = fp;
if (S_ISREG(ip->i_di.di_mode)) {
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
gfs2_glock_dq_uninit(&i_gh);
fail:
- set_v2fp(file, NULL);
+ file->private_data = NULL;
kfree(fp);
return error;
static int gfs2_close(struct inode *inode, struct file *file)
{
- struct gfs2_sbd *sdp = get_v2sdp(inode->i_sb);
+ struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
struct gfs2_file *fp;
- atomic_inc(&sdp->sd_ops_file);
-
- fp = get_v2fp(file);
- set_v2fp(file, NULL);
+ fp = file->private_data;
+ file->private_data = NULL;
if (gfs2_assert_warn(sdp, fp))
return -EIO;
static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync)
{
- struct gfs2_inode *ip = get_v2ip(dentry->d_inode);
+ struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
- atomic_inc(&ip->i_sbd->sd_ops_file);
- gfs2_log_flush_glock(ip->i_gl);
+ gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
return 0;
}
static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
- struct gfs2_sbd *sdp = ip->i_sbd;
+ struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
+ struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
struct lm_lockname name =
{ .ln_number = ip->i_num.no_addr,
.ln_type = LM_TYPE_PLOCK };
- atomic_inc(&sdp->sd_ops_file);
-
if (!(fl->fl_flags & FL_POSIX))
return -ENOLCK;
if ((ip->i_di.di_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
if (sdp->sd_args.ar_localflocks) {
if (IS_GETLK(cmd)) {
- struct file_lock *tmp;
- lock_kernel();
- tmp = posix_test_lock(file, fl);
+ struct file_lock tmp;
+ int ret;
+ ret = posix_test_lock(file, fl, &tmp);
fl->fl_type = F_UNLCK;
- if (tmp)
- memcpy(fl, tmp, sizeof(struct file_lock));
- unlock_kernel();
+ if (ret)
+ memcpy(fl, &tmp, sizeof(struct file_lock));
return 0;
} else {
- int error;
- lock_kernel();
- error = posix_lock_file_wait(file, fl);
- unlock_kernel();
- return error;
+ return posix_lock_file_wait(file, fl);
}
}
return gfs2_lm_plock(sdp, &name, file, cmd, fl);
}
-/**
- * gfs2_sendfile - Send bytes to a file or socket
- * @in_file: The file to read from
- * @out_file: The file to write to
- * @count: The amount of data
- * @offset: The beginning file offset
- *
- * Outputs: offset - updated according to number of bytes read
- *
- * Returns: The number of bytes sent, errno on failure
- */
-
-static ssize_t gfs2_sendfile(struct file *in_file, loff_t *offset, size_t count,
- read_actor_t actor, void *target)
-{
- struct gfs2_inode *ip = get_v2ip(in_file->f_mapping->host);
-
- atomic_inc(&ip->i_sbd->sd_ops_file);
-
- return generic_file_sendfile(in_file, offset, count, actor, target);
-}
-
static int do_flock(struct file *file, int cmd, struct file_lock *fl)
{
- struct gfs2_file *fp = get_v2fp(file);
+ struct gfs2_file *fp = file->private_data;
struct gfs2_holder *fl_gh = &fp->f_fl_gh;
- struct gfs2_inode *ip = fp->f_inode;
+ struct gfs2_inode *ip = GFS2_I(file->f_dentry->d_inode);
struct gfs2_glock *gl;
unsigned int state;
int flags;
state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
flags = ((IS_SETLKW(cmd)) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE;
- down(&fp->f_fl_mutex);
+ mutex_lock(&fp->f_fl_mutex);
gl = fl_gh->gh_gl;
if (gl) {
&(struct file_lock){.fl_type = F_UNLCK});
gfs2_glock_dq_uninit(fl_gh);
} else {
- error = gfs2_glock_get(ip->i_sbd,
+ error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
ip->i_num.no_addr, &gfs2_flock_glops,
CREATE, &gl);
if (error)
error = -EAGAIN;
} else {
error = flock_lock_file_wait(file, fl);
- gfs2_assert_warn(ip->i_sbd, !error);
+ gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
}
out:
- up(&fp->f_fl_mutex);
+ mutex_unlock(&fp->f_fl_mutex);
return error;
}
static void do_unflock(struct file *file, struct file_lock *fl)
{
- struct gfs2_file *fp = get_v2fp(file);
+ struct gfs2_file *fp = file->private_data;
struct gfs2_holder *fl_gh = &fp->f_fl_gh;
- down(&fp->f_fl_mutex);
+ mutex_lock(&fp->f_fl_mutex);
flock_lock_file_wait(file, fl);
if (fl_gh->gh_gl)
gfs2_glock_dq_uninit(fl_gh);
- up(&fp->f_fl_mutex);
+ mutex_unlock(&fp->f_fl_mutex);
}
/**
static int gfs2_flock(struct file *file, int cmd, struct file_lock *fl)
{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
- struct gfs2_sbd *sdp = ip->i_sbd;
-
- atomic_inc(&ip->i_sbd->sd_ops_file);
+ struct gfs2_inode *ip = GFS2_I(file->f_mapping->host);
+ struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
return do_flock(file, cmd, fl);
}
-struct file_operations gfs2_file_fops = {
+const struct file_operations gfs2_file_fops = {
.llseek = gfs2_llseek,
.read = gfs2_read,
.readv = gfs2_file_readv,
.write = generic_file_write,
.writev = generic_file_writev,
.aio_write = generic_file_aio_write,
- .ioctl = gfs2_ioctl,
+ .unlocked_ioctl = gfs2_ioctl,
.mmap = gfs2_mmap,
.open = gfs2_open,
.release = gfs2_close,
.fsync = gfs2_fsync,
.lock = gfs2_lock,
- .sendfile = gfs2_sendfile,
+ .sendfile = generic_file_sendfile,
.flock = gfs2_flock,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
};
-struct file_operations gfs2_dir_fops = {
+const struct file_operations gfs2_dir_fops = {
.readdir = gfs2_readdir,
- .ioctl = gfs2_ioctl,
+ .unlocked_ioctl = gfs2_ioctl,
.open = gfs2_open,
.release = gfs2_close,
.fsync = gfs2_fsync,
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blobdiff