/*
* 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
- * of the GNU General Public License v.2.
+ * of the GNU General Public License version 2.
*/
-#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/uio.h>
#include <linux/blkdev.h>
#include <linux/mm.h>
-#include <linux/smp_lock.h>
-#include <linux/gfs2_ioctl.h>
-#include <asm/semaphore.h>
+#include <linux/fs.h>
+#include <linux/gfs2_ondisk.h>
+#include <linux/ext2_fs.h>
+#include <linux/crc32.h>
+#include <linux/lm_interface.h>
+#include <linux/writeback.h>
#include <asm/uaccess.h>
#include "gfs2.h"
+#include "incore.h"
#include "bmap.h"
#include "dir.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
-#include "jdata.h"
#include "lm.h"
#include "log.h"
#include "meta_io.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 {
- char *fbe_name;
- unsigned int fbe_length;
- uint64_t fbe_offset;
- struct gfs2_inum fbe_inum;
- unsigned int fbe_type;
+/*
+ * 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_sentinel = {
+ .f_flags = O_NOATIME|O_RDONLY,
};
-struct filldir_bad {
- struct gfs2_sbd *fdb_sbd;
-
- struct filldir_bad_entry *fdb_entry;
- unsigned int fdb_entry_num;
- unsigned int fdb_entry_off;
+static int gfs2_read_actor(read_descriptor_t *desc, struct page *page,
+ unsigned long offset, unsigned long size)
+{
+ char *kaddr;
+ unsigned long count = desc->count;
- char *fdb_name;
- unsigned int fdb_name_size;
- unsigned int fdb_name_off;
-};
+ if (size > count)
+ size = count;
-/* For regular, non-NFS */
-struct filldir_reg {
- struct gfs2_sbd *fdr_sbd;
- int fdr_prefetch;
+ kaddr = kmap(page);
+ memcpy(desc->arg.data, kaddr + offset, size);
+ kunmap(page);
- filldir_t fdr_filldir;
- void *fdr_opaque;
-};
+ desc->count = count - size;
+ desc->written += size;
+ desc->arg.buf += size;
+ return size;
+}
-typedef ssize_t(*do_rw_t) (struct file *file,
- char __user *buf,
- size_t size, loff_t *offset,
- unsigned int num_gh, struct gfs2_holder *ghs);
+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_inode;
+ read_descriptor_t desc;
+ desc.written = 0;
+ desc.arg.data = buf;
+ desc.count = size;
+ desc.error = 0;
+ do_generic_mapping_read(inode->i_mapping, ra_state,
+ &gfs2_internal_file_sentinel, pos, &desc,
+ gfs2_read_actor);
+ return desc.written ? desc.written : desc.error;
+}
/**
* gfs2_llseek - seek to a location in a file
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);
return error;
}
-static inline unsigned int vma2state(struct vm_area_struct *vma)
-{
- if ((vma->vm_flags & (VM_MAYWRITE | VM_MAYSHARE)) ==
- (VM_MAYWRITE | VM_MAYSHARE))
- return LM_ST_EXCLUSIVE;
- return LM_ST_SHARED;
-}
-
-static ssize_t walk_vm_hard(struct file *file, const char __user *buf, size_t size,
- loff_t *offset, do_rw_t operation)
-{
- struct gfs2_holder *ghs;
- unsigned int num_gh = 0;
- ssize_t count;
- struct super_block *sb = file->f_dentry->d_inode->i_sb;
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- unsigned long start = (unsigned long)buf;
- unsigned long end = start + size;
- int dumping = (current->flags & PF_DUMPCORE);
- unsigned int x = 0;
-
- for (vma = find_vma(mm, start); vma; vma = vma->vm_next) {
- if (end <= vma->vm_start)
- break;
- if (vma->vm_file &&
- vma->vm_file->f_dentry->d_inode->i_sb == sb) {
- num_gh++;
- }
- }
-
- ghs = kcalloc((num_gh + 1), sizeof(struct gfs2_holder), GFP_KERNEL);
- if (!ghs) {
- if (!dumping)
- up_read(&mm->mmap_sem);
- return -ENOMEM;
- }
-
- for (vma = find_vma(mm, start); vma; vma = vma->vm_next) {
- if (end <= vma->vm_start)
- break;
- if (vma->vm_file) {
- struct inode *inode = vma->vm_file->f_dentry->d_inode;
- if (inode->i_sb == sb)
- gfs2_holder_init(get_v2ip(inode)->i_gl,
- vma2state(vma), 0, &ghs[x++]);
- }
- }
-
- if (!dumping)
- up_read(&mm->mmap_sem);
-
- gfs2_assert(get_v2sdp(sb), x == num_gh);
-
- count = operation(file, buf, size, offset, num_gh, ghs);
-
- while (num_gh--)
- gfs2_holder_uninit(&ghs[num_gh]);
- kfree(ghs);
-
- return count;
-}
-
-/**
- * walk_vm - Walk the vmas associated with a buffer for read or write.
- * If any of them are gfs2, pass the gfs2 inode down to the read/write
- * worker function so that locks can be acquired in the correct order.
- * @file: The file to read/write from/to
- * @buf: The buffer to copy to/from
- * @size: The amount of data requested
- * @offset: The current file offset
- * @operation: The read or write worker function
- *
- * Outputs: Offset - updated according to number of bytes written
- *
- * Returns: The number of bytes written, errno on failure
- */
-
-static ssize_t walk_vm(struct file *file, const char __user *buf, size_t size,
- loff_t *offset, do_rw_t operation)
-{
- struct gfs2_holder gh;
-
- if (current->mm) {
- struct super_block *sb = file->f_dentry->d_inode->i_sb;
- struct mm_struct *mm = current->mm;
- struct vm_area_struct *vma;
- unsigned long start = (unsigned long)buf;
- unsigned long end = start + size;
- int dumping = (current->flags & PF_DUMPCORE);
-
- if (!dumping)
- down_read(&mm->mmap_sem);
-
- for (vma = find_vma(mm, start); vma; vma = vma->vm_next) {
- if (end <= vma->vm_start)
- break;
- if (vma->vm_file &&
- vma->vm_file->f_dentry->d_inode->i_sb == sb)
- goto do_locks;
- }
-
- if (!dumping)
- up_read(&mm->mmap_sem);
- }
-
- return operation(file, buf, size, offset, 0, &gh);
-
-do_locks:
- return walk_vm_hard(file, buf, size, offset, operation);
-}
-
-static ssize_t do_jdata_read(struct file *file, char __user *buf, size_t size,
- loff_t *offset)
-{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
- ssize_t count = 0;
-
- if (*offset < 0)
- return -EINVAL;
- if (!access_ok(VERIFY_WRITE, buf, size))
- return -EFAULT;
-
- if (!(file->f_flags & O_LARGEFILE)) {
- if (*offset >= MAX_NON_LFS)
- return -EFBIG;
- if (*offset + size > MAX_NON_LFS)
- size = MAX_NON_LFS - *offset;
- }
-
- count = gfs2_jdata_read(ip, buf, *offset, size, gfs2_copy2user);
-
- if (count > 0)
- *offset += count;
-
- return count;
-}
-
-/**
- * do_read_direct - Read bytes from a file
- * @file: The file to read from
- * @buf: The buffer to copy into
- * @size: The amount of data requested
- * @offset: The current file offset
- * @num_gh: The number of other locks we need to do the read
- * @ghs: the locks we need plus one for our lock
- *
- * Outputs: Offset - updated according to number of bytes read
- *
- * Returns: The number of bytes read, errno on failure
- */
-
-static ssize_t do_read_direct(struct file *file, char __user *buf, size_t size,
- loff_t *offset, unsigned int num_gh,
- struct gfs2_holder *ghs)
-{
- struct inode *inode = file->f_mapping->host;
- struct gfs2_inode *ip = get_v2ip(inode);
- unsigned int state = LM_ST_DEFERRED;
- int flags = 0;
- unsigned int x;
- ssize_t count = 0;
- int error;
-
- for (x = 0; x < num_gh; x++)
- if (ghs[x].gh_gl == ip->i_gl) {
- state = LM_ST_SHARED;
- flags |= GL_LOCAL_EXCL;
- break;
- }
-
- gfs2_holder_init(ip->i_gl, state, flags, &ghs[num_gh]);
-
- error = gfs2_glock_nq_m(num_gh + 1, ghs);
- if (error)
- goto out;
-
- error = -EINVAL;
- if (gfs2_is_jdata(ip))
- goto out_gunlock;
-
- if (gfs2_is_stuffed(ip)) {
- size_t mask = bdev_hardsect_size(inode->i_sb->s_bdev) - 1;
-
- if (((*offset) & mask) || (((unsigned long)buf) & mask))
- goto out_gunlock;
-
- count = do_jdata_read(file, buf, size & ~mask, offset);
- } else
- count = generic_file_read(file, buf, size, offset);
-
- error = 0;
-
- out_gunlock:
- gfs2_glock_dq_m(num_gh + 1, ghs);
-
- out:
- gfs2_holder_uninit(&ghs[num_gh]);
-
- return (count) ? count : error;
-}
-
-/**
- * do_read_buf - Read bytes from a file
- * @file: The file to read from
- * @buf: The buffer to copy into
- * @size: The amount of data requested
- * @offset: The current file offset
- * @num_gh: The number of other locks we need to do the read
- * @ghs: the locks we need plus one for our lock
- *
- * Outputs: Offset - updated according to number of bytes read
- *
- * Returns: The number of bytes read, errno on failure
- */
-
-static ssize_t do_read_buf(struct file *file, char __user *buf, size_t size,
- loff_t *offset, unsigned int num_gh,
- struct gfs2_holder *ghs)
-{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
- ssize_t count = 0;
- int error;
-
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &ghs[num_gh]);
-
- error = gfs2_glock_nq_m_atime(num_gh + 1, ghs);
- if (error)
- goto out;
-
- if (gfs2_is_jdata(ip))
- count = do_jdata_read(file, buf, size, offset);
- else
- count = generic_file_read(file, buf, size, offset);
-
- gfs2_glock_dq_m(num_gh + 1, ghs);
-
- out:
- gfs2_holder_uninit(&ghs[num_gh]);
-
- return (count) ? count : error;
-}
-
-/**
- * gfs2_read - Read bytes from a file
- * @file: The file to read from
- * @buf: The buffer to copy into
- * @size: The amount of data requested
- * @offset: The current file offset
- *
- * Outputs: Offset - updated according to number of bytes read
- *
- * Returns: The number of bytes read, errno on failure
- */
-
-static ssize_t gfs2_read(struct file *file, char __user *buf, size_t size,
- loff_t *offset)
-{
- atomic_inc(&get_v2sdp(file->f_mapping->host->i_sb)->sd_ops_file);
-
- if (file->f_flags & O_DIRECT)
- return walk_vm(file, buf, size, offset, do_read_direct);
- else
- return walk_vm(file, buf, size, offset, do_read_buf);
-}
-
-/**
- * grope_mapping - feel up a mapping that needs to be written
- * @buf: the start of the memory to be written
- * @size: the size of the memory to be written
- *
- * We do this after acquiring the locks on the mapping,
- * but before starting the write transaction. We need to make
- * sure that we don't cause recursive transactions if blocks
- * need to be allocated to the file backing the mapping.
- *
- * Returns: errno
- */
-
-static int grope_mapping(const char __user *buf, size_t size)
-{
- const char __user *stop = buf + size;
- char c;
-
- while (buf < stop) {
- if (copy_from_user(&c, buf, 1))
- return -EFAULT;
- buf += PAGE_CACHE_SIZE;
- buf = (const char __user *)PAGE_ALIGN((unsigned long)buf);
- }
-
- return 0;
-}
-
-/**
- * do_write_direct_alloc - Write bytes to a file
- * @file: The file to write to
- * @buf: The buffer to copy from
- * @size: The amount of data requested
- * @offset: The current file offset
- *
- * Outputs: Offset - updated according to number of bytes written
- *
- * Returns: The number of bytes written, errno on failure
- */
-
-static ssize_t do_write_direct_alloc(struct file *file, const char __user *buf, size_t size,
- loff_t *offset)
-{
- struct inode *inode = file->f_mapping->host;
- struct gfs2_inode *ip = get_v2ip(inode);
- struct gfs2_sbd *sdp = ip->i_sbd;
- struct gfs2_alloc *al = NULL;
- struct iovec local_iov = { .iov_base = buf, .iov_len = size };
- struct buffer_head *dibh;
- unsigned int data_blocks, ind_blocks;
- ssize_t count;
- int error;
-
- gfs2_write_calc_reserv(ip, size, &data_blocks, &ind_blocks);
-
- al = gfs2_alloc_get(ip);
-
- error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto fail;
-
- error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
- if (error)
- goto fail_gunlock_q;
-
- al->al_requested = data_blocks + ind_blocks;
-
- error = gfs2_inplace_reserve(ip);
- if (error)
- goto fail_gunlock_q;
-
- error = gfs2_trans_begin(sdp,
- al->al_rgd->rd_ri.ri_length + ind_blocks +
- RES_DINODE + RES_STATFS + RES_QUOTA, 0);
- if (error)
- goto fail_ipres;
-
- if ((ip->i_di.di_mode & (S_ISUID | S_ISGID)) && !capable(CAP_FSETID)) {
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto fail_end_trans;
-
- ip->i_di.di_mode &= (ip->i_di.di_mode & S_IXGRP) ?
- (~(S_ISUID | S_ISGID)) : (~S_ISUID);
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
- brelse(dibh);
- }
-
- if (gfs2_is_stuffed(ip)) {
- error = gfs2_unstuff_dinode(ip, gfs2_unstuffer_sync, NULL);
- if (error)
- goto fail_end_trans;
- }
-
- count = generic_file_write_nolock(file, &local_iov, 1, offset);
- if (count < 0) {
- error = count;
- goto fail_end_trans;
- }
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto fail_end_trans;
-
- if (ip->i_di.di_size < inode->i_size)
- ip->i_di.di_size = inode->i_size;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
- brelse(dibh);
-
- gfs2_trans_end(sdp);
-
- if (file->f_flags & O_SYNC)
- gfs2_log_flush_glock(ip->i_gl);
-
- gfs2_inplace_release(ip);
- gfs2_quota_unlock(ip);
- gfs2_alloc_put(ip);
-
- if (file->f_mapping->nrpages) {
- error = filemap_fdatawrite(file->f_mapping);
- if (!error)
- error = filemap_fdatawait(file->f_mapping);
- }
- if (error)
- return error;
-
- return count;
-
- fail_end_trans:
- gfs2_trans_end(sdp);
-
- fail_ipres:
- gfs2_inplace_release(ip);
-
- fail_gunlock_q:
- gfs2_quota_unlock(ip);
-
- fail:
- gfs2_alloc_put(ip);
-
- return error;
-}
-
/**
- * do_write_direct - Write bytes to a file
- * @file: The file to write to
- * @buf: The buffer to copy from
- * @size: The amount of data requested
- * @offset: The current file offset
- * @num_gh: The number of other locks we need to do the read
- * @gh: the locks we need plus one for our lock
- *
- * Outputs: Offset - updated according to number of bytes written
- *
- * Returns: The number of bytes written, errno on failure
- */
-
-static ssize_t do_write_direct(struct file *file, const char __user *buf, size_t size,
- loff_t *offset, unsigned int num_gh,
- struct gfs2_holder *ghs)
-{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
- struct gfs2_sbd *sdp = ip->i_sbd;
- struct gfs2_file *fp = get_v2fp(file);
- unsigned int state = LM_ST_DEFERRED;
- int alloc_required;
- unsigned int x;
- size_t s;
- ssize_t count = 0;
- int error;
-
- if (test_bit(GFF_DID_DIRECT_ALLOC, &fp->f_flags))
- state = LM_ST_EXCLUSIVE;
- else
- for (x = 0; x < num_gh; x++)
- if (ghs[x].gh_gl == ip->i_gl) {
- state = LM_ST_EXCLUSIVE;
- break;
- }
-
- restart:
- gfs2_holder_init(ip->i_gl, state, 0, &ghs[num_gh]);
-
- error = gfs2_glock_nq_m(num_gh + 1, ghs);
- if (error)
- goto out;
-
- error = -EINVAL;
- if (gfs2_is_jdata(ip))
- goto out_gunlock;
-
- if (num_gh) {
- error = grope_mapping(buf, size);
- if (error)
- goto out_gunlock;
- }
-
- if (file->f_flags & O_APPEND)
- *offset = ip->i_di.di_size;
-
- if (!(file->f_flags & O_LARGEFILE)) {
- error = -EFBIG;
- if (*offset >= MAX_NON_LFS)
- goto out_gunlock;
- if (*offset + size > MAX_NON_LFS)
- size = MAX_NON_LFS - *offset;
- }
-
- if (gfs2_is_stuffed(ip) ||
- *offset + size > ip->i_di.di_size ||
- ((ip->i_di.di_mode & (S_ISUID | S_ISGID)) && !capable(CAP_FSETID)))
- alloc_required = 1;
- else {
- error = gfs2_write_alloc_required(ip, *offset, size,
- &alloc_required);
- if (error)
- goto out_gunlock;
- }
-
- if (alloc_required && state != LM_ST_EXCLUSIVE) {
- gfs2_glock_dq_m(num_gh + 1, ghs);
- gfs2_holder_uninit(&ghs[num_gh]);
- state = LM_ST_EXCLUSIVE;
- goto restart;
- }
-
- if (alloc_required) {
- set_bit(GFF_DID_DIRECT_ALLOC, &fp->f_flags);
-
- /* split large writes into smaller atomic transactions */
- while (size) {
- s = gfs2_tune_get(sdp, gt_max_atomic_write);
- if (s > size)
- s = size;
-
- error = do_write_direct_alloc(file, buf, s, offset);
- if (error < 0)
- goto out_gunlock;
-
- buf += error;
- size -= error;
- count += error;
- }
- } else {
- struct iovec local_iov = { .iov_base = buf, .iov_len = size };
- struct gfs2_holder t_gh;
-
- clear_bit(GFF_DID_DIRECT_ALLOC, &fp->f_flags);
-
- error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED,
- GL_NEVER_RECURSE, &t_gh);
- if (error)
- goto out_gunlock;
-
- count = generic_file_write_nolock(file, &local_iov, 1, offset);
-
- gfs2_glock_dq_uninit(&t_gh);
- }
-
- error = 0;
-
- out_gunlock:
- gfs2_glock_dq_m(num_gh + 1, ghs);
-
- out:
- gfs2_holder_uninit(&ghs[num_gh]);
-
- return (count) ? count : error;
-}
-
-/**
- * do_do_write_buf - Write bytes to a file
- * @file: The file to write to
- * @buf: The buffer to copy from
- * @size: The amount of data requested
- * @offset: The current file offset
- *
- * Outputs: Offset - updated according to number of bytes written
- *
- * Returns: The number of bytes written, errno on failure
- */
-
-static ssize_t do_do_write_buf(struct file *file, const char __user *buf, size_t size,
- loff_t *offset)
-{
- struct inode *inode = file->f_mapping->host;
- struct gfs2_inode *ip = get_v2ip(inode);
- struct gfs2_sbd *sdp = ip->i_sbd;
- struct gfs2_alloc *al = NULL;
- struct buffer_head *dibh;
- unsigned int data_blocks, ind_blocks;
- int alloc_required, journaled;
- ssize_t count;
- int error;
-
- journaled = gfs2_is_jdata(ip);
-
- gfs2_write_calc_reserv(ip, size, &data_blocks, &ind_blocks);
-
- error = gfs2_write_alloc_required(ip, *offset, size, &alloc_required);
- if (error)
- return error;
-
- if (alloc_required) {
- al = gfs2_alloc_get(ip);
-
- error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
- if (error)
- goto fail;
-
- error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
- if (error)
- goto fail_gunlock_q;
-
- al->al_requested = data_blocks + ind_blocks;
-
- error = gfs2_inplace_reserve(ip);
- if (error)
- goto fail_gunlock_q;
-
- error = gfs2_trans_begin(sdp,
- al->al_rgd->rd_ri.ri_length +
- ind_blocks +
- ((journaled) ? data_blocks : 0) +
- RES_DINODE + RES_STATFS + RES_QUOTA,
- 0);
- if (error)
- goto fail_ipres;
- } else {
- error = gfs2_trans_begin(sdp,
- ((journaled) ? data_blocks : 0) +
- RES_DINODE,
- 0);
- if (error)
- goto fail_ipres;
- }
-
- if ((ip->i_di.di_mode & (S_ISUID | S_ISGID)) && !capable(CAP_FSETID)) {
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto fail_end_trans;
-
- ip->i_di.di_mode &= (ip->i_di.di_mode & S_IXGRP) ?
- (~(S_ISUID | S_ISGID)) : (~S_ISUID);
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
- brelse(dibh);
- }
-
- if (journaled) {
- count = gfs2_jdata_write(ip, buf, *offset, size,
- gfs2_copy_from_user);
- if (count < 0) {
- error = count;
- goto fail_end_trans;
- }
-
- *offset += count;
- } else {
- struct iovec local_iov = { .iov_base = buf, .iov_len = size };
-
- count = generic_file_write_nolock(file, &local_iov, 1, offset);
- if (count < 0) {
- error = count;
- goto fail_end_trans;
- }
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto fail_end_trans;
-
- if (ip->i_di.di_size < inode->i_size)
- ip->i_di.di_size = inode->i_size;
- ip->i_di.di_mtime = ip->i_di.di_ctime = get_seconds();
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
- brelse(dibh);
- }
-
- gfs2_trans_end(sdp);
-
- if (file->f_flags & O_SYNC || IS_SYNC(inode)) {
- gfs2_log_flush_glock(ip->i_gl);
- error = filemap_fdatawrite(file->f_mapping);
- if (error == 0)
- error = filemap_fdatawait(file->f_mapping);
- if (error)
- goto fail_ipres;
- }
-
- if (alloc_required) {
- gfs2_assert_warn(sdp, count != size ||
- al->al_alloced);
- gfs2_inplace_release(ip);
- gfs2_quota_unlock(ip);
- gfs2_alloc_put(ip);
- }
-
- return count;
-
- fail_end_trans:
- gfs2_trans_end(sdp);
-
- fail_ipres:
- if (alloc_required)
- gfs2_inplace_release(ip);
-
- fail_gunlock_q:
- if (alloc_required)
- gfs2_quota_unlock(ip);
-
- fail:
- if (alloc_required)
- gfs2_alloc_put(ip);
-
- return error;
-}
-
-/**
- * do_write_buf - Write bytes to a file
- * @file: The file to write to
- * @buf: The buffer to copy from
- * @size: The amount of data requested
- * @offset: The current file offset
- * @num_gh: The number of other locks we need to do the read
- * @gh: the locks we need plus one for our lock
- *
- * Outputs: Offset - updated according to number of bytes written
- *
- * Returns: The number of bytes written, errno on failure
- */
-
-static ssize_t do_write_buf(struct file *file, const char __user *buf, size_t size,
- loff_t *offset, unsigned int num_gh,
- struct gfs2_holder *ghs)
-{
- struct gfs2_inode *ip = get_v2ip(file->f_mapping->host);
- struct gfs2_sbd *sdp = ip->i_sbd;
- size_t s;
- ssize_t count = 0;
- int error;
-
- gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &ghs[num_gh]);
-
- error = gfs2_glock_nq_m(num_gh + 1, ghs);
- if (error)
- goto out;
-
- if (num_gh) {
- error = grope_mapping(buf, size);
- if (error)
- goto out_gunlock;
- }
-
- if (file->f_flags & O_APPEND)
- *offset = ip->i_di.di_size;
-
- if (!(file->f_flags & O_LARGEFILE)) {
- error = -EFBIG;
- if (*offset >= MAX_NON_LFS)
- goto out_gunlock;
- if (*offset + size > MAX_NON_LFS)
- size = MAX_NON_LFS - *offset;
- }
-
- /* split large writes into smaller atomic transactions */
- while (size) {
- s = gfs2_tune_get(sdp, gt_max_atomic_write);
- if (s > size)
- s = size;
-
- error = do_do_write_buf(file, buf, s, offset);
- if (error < 0)
- goto out_gunlock;
-
- buf += error;
- size -= error;
- count += error;
- }
-
- error = 0;
-
- out_gunlock:
- gfs2_glock_dq_m(num_gh + 1, ghs);
-
- out:
- gfs2_holder_uninit(&ghs[num_gh]);
-
- return (count) ? count : error;
-}
-
-/**
- * gfs2_write - Write bytes to a file
- * @file: The file to write to
- * @buf: The buffer to copy from
- * @size: The amount of data requested
- * @offset: The current file offset
- *
- * Outputs: Offset - updated according to number of bytes written
- *
- * Returns: The number of bytes written, errno on failure
- */
-
-static ssize_t gfs2_write(struct file *file, const char __user *buf,
- size_t size, loff_t *offset)
-{
- struct inode *inode = file->f_mapping->host;
- ssize_t count;
-
- atomic_inc(&get_v2sdp(inode->i_sb)->sd_ops_file);
-
- if (*offset < 0)
- return -EINVAL;
- if (!access_ok(VERIFY_READ, buf, size))
- return -EFAULT;
-
- mutex_lock(&inode->i_mutex);
- if (file->f_flags & O_DIRECT)
- count = walk_vm(file, buf, size, offset,
- do_write_direct);
- else
- count = walk_vm(file, buf, size, offset, do_write_buf);
- mutex_unlock(&inode->i_mutex);
-
- return count;
-}
-
-/**
- * filldir_reg_func - Report a directory entry to the caller of gfs2_dir_read()
- * @opaque: opaque data used by the function
- * @name: the name of the directory entry
- * @length: the length of the name
- * @offset: the entry's offset in the directory
- * @inum: the inode number the entry points to
- * @type: the type of inode the entry points to
- *
- * Returns: 0 on success, 1 if buffer full
- */
-
-static int filldir_reg_func(void *opaque, const char *name, unsigned int length,
- uint64_t offset, struct gfs2_inum *inum,
- unsigned int type)
-{
- struct filldir_reg *fdr = (struct filldir_reg *)opaque;
- struct gfs2_sbd *sdp = fdr->fdr_sbd;
- int error;
-
- error = fdr->fdr_filldir(fdr->fdr_opaque, name, length, offset,
- inum->no_formal_ino, type);
- if (error)
- return 1;
-
- if (fdr->fdr_prefetch && !(length == 1 && *name == '.')) {
- gfs2_glock_prefetch_num(sdp,
- inum->no_addr, &gfs2_inode_glops,
- LM_ST_SHARED, LM_FLAG_TRY | LM_FLAG_ANY);
- gfs2_glock_prefetch_num(sdp,
- inum->no_addr, &gfs2_iopen_glops,
- LM_ST_SHARED, LM_FLAG_TRY);
- }
-
- return 0;
-}
-
-/**
- * readdir_reg - Read directory entries from a directory
+ * gfs2_readdir - Read directory entries from a directory
* @file: The directory to read from
* @dirent: Buffer for dirents
* @filldir: Function used to do the copying
* Returns: errno
*/
-static int readdir_reg(struct file *file, void *dirent, filldir_t filldir)
+static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
{
- struct gfs2_inode *dip = get_v2ip(file->f_mapping->host);
- struct filldir_reg fdr;
+ struct inode *dir = file->f_mapping->host;
+ struct gfs2_inode *dip = GFS2_I(dir);
struct gfs2_holder d_gh;
- uint64_t offset = file->f_pos;
+ u64 offset = file->f_pos;
int error;
- fdr.fdr_sbd = dip->i_sbd;
- fdr.fdr_prefetch = 1;
- fdr.fdr_filldir = filldir;
- fdr.fdr_opaque = dirent;
-
gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh);
error = gfs2_glock_nq_atime(&d_gh);
if (error) {
return error;
}
- error = gfs2_dir_read(dip, &offset, &fdr, filldir_reg_func);
+ error = gfs2_dir_read(dir, &offset, dirent, filldir);
gfs2_glock_dq_uninit(&d_gh);
}
/**
- * filldir_bad_func - Report a directory entry to the caller of gfs2_dir_read()
- * @opaque: opaque data used by the function
- * @name: the name of the directory entry
- * @length: the length of the name
- * @offset: the entry's offset in the directory
- * @inum: the inode number the entry points to
- * @type: the type of inode the entry points to
+ * fsflags_cvt
+ * @table: A table of 32 u32 flags
+ * @val: a 32 bit value to convert
*
- * For supporting NFS.
+ * This function can be used to convert between fsflags values and
+ * GFS2's own flags values.
*
- * Returns: 0 on success, 1 if buffer full
+ * Returns: the converted flags
*/
-
-static int filldir_bad_func(void *opaque, const char *name, unsigned int length,
- uint64_t offset, struct gfs2_inum *inum,
- unsigned int type)
+static u32 fsflags_cvt(const u32 *table, u32 val)
{
- struct filldir_bad *fdb = (struct filldir_bad *)opaque;
- struct gfs2_sbd *sdp = fdb->fdb_sbd;
- struct filldir_bad_entry *fbe;
-
- if (fdb->fdb_entry_off == fdb->fdb_entry_num ||
- fdb->fdb_name_off + length > fdb->fdb_name_size)
- return 1;
-
- fbe = &fdb->fdb_entry[fdb->fdb_entry_off];
- fbe->fbe_name = fdb->fdb_name + fdb->fdb_name_off;
- memcpy(fbe->fbe_name, name, length);
- fbe->fbe_length = length;
- fbe->fbe_offset = offset;
- fbe->fbe_inum = *inum;
- fbe->fbe_type = type;
-
- fdb->fdb_entry_off++;
- fdb->fdb_name_off += length;
-
- if (!(length == 1 && *name == '.')) {
- gfs2_glock_prefetch_num(sdp,
- inum->no_addr, &gfs2_inode_glops,
- LM_ST_SHARED, LM_FLAG_TRY | LM_FLAG_ANY);
- gfs2_glock_prefetch_num(sdp,
- inum->no_addr, &gfs2_iopen_glops,
- LM_ST_SHARED, LM_FLAG_TRY);
- }
-
- return 0;
+ u32 res = 0;
+ while(val) {
+ if (val & 1)
+ res |= *table;
+ table++;
+ val >>= 1;
+ }
+ return res;
}
-/**
- * readdir_bad - Read directory entries from a directory
- * @file: The directory to read from
- * @dirent: Buffer for dirents
- * @filldir: Function used to do the copying
- *
- * For supporting NFS.
- *
- * Returns: errno
- */
+static const u32 fsflags_to_gfs2[32] = {
+ [3] = GFS2_DIF_SYNC,
+ [4] = GFS2_DIF_IMMUTABLE,
+ [5] = GFS2_DIF_APPENDONLY,
+ [7] = GFS2_DIF_NOATIME,
+ [12] = GFS2_DIF_EXHASH,
+ [14] = GFS2_DIF_JDATA,
+ [20] = GFS2_DIF_DIRECTIO,
+};
-static int readdir_bad(struct file *file, void *dirent, filldir_t filldir)
+static const u32 gfs2_to_fsflags[32] = {
+ [gfs2fl_Sync] = FS_SYNC_FL,
+ [gfs2fl_Immutable] = FS_IMMUTABLE_FL,
+ [gfs2fl_AppendOnly] = FS_APPEND_FL,
+ [gfs2fl_NoAtime] = FS_NOATIME_FL,
+ [gfs2fl_ExHash] = FS_INDEX_FL,
+ [gfs2fl_Jdata] = FS_JOURNAL_DATA_FL,
+ [gfs2fl_Directio] = FS_DIRECTIO_FL,
+ [gfs2fl_InheritDirectio] = FS_DIRECTIO_FL,
+ [gfs2fl_InheritJdata] = FS_JOURNAL_DATA_FL,
+};
+
+static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
{
- struct gfs2_inode *dip = get_v2ip(file->f_mapping->host);
- struct gfs2_sbd *sdp = dip->i_sbd;
- struct filldir_reg fdr;
- unsigned int entries, size;
- struct filldir_bad *fdb;
- struct gfs2_holder d_gh;
- uint64_t offset = file->f_pos;
- unsigned int x;
- struct filldir_bad_entry *fbe;
+ struct inode *inode = filp->f_path.dentry->d_inode;
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_holder gh;
int error;
+ u32 fsflags;
- entries = gfs2_tune_get(sdp, gt_entries_per_readdir);
- size = sizeof(struct filldir_bad) +
- entries * (sizeof(struct filldir_bad_entry) + GFS2_FAST_NAME_SIZE);
-
- fdb = kzalloc(size, GFP_KERNEL);
- if (!fdb)
- return -ENOMEM;
-
- fdb->fdb_sbd = sdp;
- fdb->fdb_entry = (struct filldir_bad_entry *)(fdb + 1);
- fdb->fdb_entry_num = entries;
- fdb->fdb_name = ((char *)fdb) + sizeof(struct filldir_bad) +
- entries * sizeof(struct filldir_bad_entry);
- fdb->fdb_name_size = entries * GFS2_FAST_NAME_SIZE;
-
- gfs2_holder_init(dip->i_gl, LM_ST_SHARED, GL_ATIME, &d_gh);
- error = gfs2_glock_nq_atime(&d_gh);
- if (error) {
- gfs2_holder_uninit(&d_gh);
- goto out;
- }
-
- error = gfs2_dir_read(dip, &offset, fdb, filldir_bad_func);
-
- gfs2_glock_dq_uninit(&d_gh);
-
- fdr.fdr_sbd = sdp;
- fdr.fdr_prefetch = 0;
- fdr.fdr_filldir = filldir;
- fdr.fdr_opaque = dirent;
-
- for (x = 0; x < fdb->fdb_entry_off; x++) {
- fbe = &fdb->fdb_entry[x];
-
- error = filldir_reg_func(&fdr,
- fbe->fbe_name, fbe->fbe_length,
- fbe->fbe_offset,
- &fbe->fbe_inum, fbe->fbe_type);
- if (error) {
- file->f_pos = fbe->fbe_offset;
- error = 0;
- goto out;
- }
- }
-
- file->f_pos = offset;
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
+ error = gfs2_glock_nq_atime(&gh);
+ if (error)
+ return error;
- out:
- kfree(fdb);
+ fsflags = fsflags_cvt(gfs2_to_fsflags, ip->i_di.di_flags);
+ if (put_user(fsflags, ptr))
+ error = -EFAULT;
+ gfs2_glock_dq_m(1, &gh);
+ gfs2_holder_uninit(&gh);
return error;
}
+void gfs2_set_inode_flags(struct inode *inode)
+{
+ struct gfs2_inode *ip = GFS2_I(inode);
+ struct gfs2_dinode_host *di = &ip->i_di;
+ unsigned int flags = inode->i_flags;
+
+ flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC);
+ if (di->di_flags & GFS2_DIF_IMMUTABLE)
+ flags |= S_IMMUTABLE;
+ if (di->di_flags & GFS2_DIF_APPENDONLY)
+ flags |= S_APPEND;
+ if (di->di_flags & GFS2_DIF_NOATIME)
+ flags |= S_NOATIME;
+ if (di->di_flags & GFS2_DIF_SYNC)
+ flags |= S_SYNC;
+ inode->i_flags = flags;
+}
+
+/* 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)
+
/**
- * gfs2_readdir - Read directory entries from a directory
- * @file: The directory to read from
- * @dirent: Buffer for dirents
- * @filldir: Function used to do the copying
+ * gfs2_set_flags - set flags on an inode
+ * @inode: The inode
+ * @flags: The flags to set
+ * @mask: Indicates which flags are valid
*
- * Returns: errno
*/
-
-static int gfs2_readdir(struct file *file, void *dirent, filldir_t filldir)
+static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
{
+ struct inode *inode = filp->f_path.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;
- 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
- error = readdir_bad(file, dirent, filldir);
-
- return error;
-}
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ if (error)
+ return error;
-static int gfs2_ioctl_flags(struct gfs2_inode *ip, unsigned int cmd, unsigned long arg)
-{
- unsigned int lmode = (cmd == GFS2_IOCTL_SETFLAGS) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
- struct buffer_head *dibh;
- struct gfs2_holder i_gh;
- int error;
- __u32 flags = 0, change;
+ flags = ip->i_di.di_flags;
+ new_flags = (flags & ~mask) | (reqflags & mask);
+ if ((new_flags ^ flags) == 0)
+ goto out;
- if (cmd == GFS2_IOCTL_SETFLAGS) {
- error = get_user(flags, (__u32 __user *)arg);
- if (error)
- return -EFAULT;
+ 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);
}
- error = gfs2_glock_nq_init(ip->i_gl, lmode, 0, &i_gh);
- if (error)
- return error;
-
- 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;
- /* FIXME: Would be nice not to require the following test */
- if ((flags & GFS2_DIF_JDATA) && ip->i_di.di_size)
- goto out;
- }
- if (flags & (GFS2_DIF_INHERIT_JDATA|GFS2_DIF_INHERIT_DIRECTIO)) {
- if (!S_ISDIR(ip->i_di.di_mode))
- goto out;
- }
+ error = -EINVAL;
+ if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
+ goto out;
- error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
+ 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_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_trans_end;
-
- ip->i_di.di_flags = flags;
-
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
-
- brelse(dibh);
-
+ 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, bh->b_data);
+ brelse(bh);
+ gfs2_set_inode_flags(inode);
out_trans_end:
- gfs2_trans_end(ip->i_sbd);
- } else {
- flags = ip->i_di.di_flags;
- }
+ 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 fsflags, gfsflags;
+ if (get_user(fsflags, ptr))
+ return -EFAULT;
+ gfsflags = fsflags_cvt(fsflags_to_gfs2, fsflags);
+ 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 FS_IOC_GETFLAGS:
+ return gfs2_get_flags(filp, (u32 __user *)arg);
+ case FS_IOC_SETFLAGS:
+ 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) {
return error;
}
- if (gfs2_is_jdata(ip)) {
- if (vma->vm_flags & VM_MAYSHARE)
- error = -EOPNOTSUPP;
- else
- vma->vm_ops = &gfs2_vm_ops_private;
- } else {
- /* This is VM_MAYWRITE instead of VM_WRITE because a call
- to mprotect() can turn on VM_WRITE later. */
-
- if ((vma->vm_flags & (VM_MAYSHARE | VM_MAYWRITE)) ==
- (VM_MAYSHARE | VM_MAYWRITE))
- vma->vm_ops = &gfs2_vm_ops_sharewrite;
- else
- vma->vm_ops = &gfs2_vm_ops_private;
- }
+ /* This is VM_MAYWRITE instead of VM_WRITE because a call
+ to mprotect() can turn on VM_WRITE later. */
+
+ if ((vma->vm_flags & (VM_MAYSHARE | VM_MAYWRITE)) ==
+ (VM_MAYSHARE | VM_MAYWRITE))
+ vma->vm_ops = &gfs2_vm_ops_sharewrite;
+ else
+ vma->vm_ops = &gfs2_vm_ops_private;
gfs2_glock_dq_uninit(&i_gh);
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)) {
+ if (S_ISREG(ip->i_inode.i_mode)) {
error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY,
&i_gh);
if (error)
if (ip->i_di.di_flags & GFS2_DIF_DIRECTIO)
file->f_flags |= O_DIRECT;
- /* Don't let the user open O_DIRECT on a jdata file */
-
- if ((file->f_flags & O_DIRECT) && gfs2_is_jdata(ip)) {
- error = -EINVAL;
- goto fail_gunlock;
- }
-
gfs2_glock_dq_uninit(&i_gh);
}
return 0;
- fail_gunlock:
+fail_gunlock:
gfs2_glock_dq_uninit(&i_gh);
-
- fail:
- set_v2fp(file, NULL);
+fail:
+ 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;
* @file: the file that points to the dentry (we ignore this)
* @dentry: the dentry that points to the inode to sync
*
+ * The VFS will flush "normal" data for us. We only need to worry
+ * about metadata here. For journaled data, we just do a log flush
+ * as we can't avoid it. Otherwise we can just bale out if datasync
+ * is set. For stuffed inodes we must flush the log in order to
+ * ensure that all data is on disk.
+ *
+ * The call to write_inode_now() is there to write back metadata and
+ * the inode itself. It does also try and write the data, but thats
+ * (hopefully) a no-op due to the VFS having already called filemap_fdatawrite()
+ * for us.
+ *
* Returns: errno
*/
static int gfs2_fsync(struct file *file, struct dentry *dentry, int datasync)
{
- struct gfs2_inode *ip = get_v2ip(dentry->d_inode);
+ struct inode *inode = dentry->d_inode;
+ int sync_state = inode->i_state & (I_DIRTY_SYNC|I_DIRTY_DATASYNC);
+ int ret = 0;
- atomic_inc(&ip->i_sbd->sd_ops_file);
- gfs2_log_flush_glock(ip->i_gl);
+ if (gfs2_is_jdata(GFS2_I(inode))) {
+ gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
+ return 0;
+ }
- return 0;
+ if (sync_state != 0) {
+ if (!datasync)
+ ret = write_inode_now(inode, 0);
+
+ if (gfs2_is_stuffed(GFS2_I(inode)))
+ gfs2_log_flush(GFS2_SB(inode), GFS2_I(inode)->i_gl);
+ }
+
+ return ret;
+}
+
+/**
+ * gfs2_setlease - acquire/release a file lease
+ * @file: the file pointer
+ * @arg: lease type
+ * @fl: file lock
+ *
+ * Returns: errno
+ */
+
+static int gfs2_setlease(struct file *file, long arg, struct file_lock **fl)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(file->f_mapping->host);
+
+ /*
+ * We don't currently have a way to enforce a lease across the whole
+ * cluster; until we do, disable leases (by just returning -EINVAL),
+ * unless the administrator has requested purely local locking.
+ */
+ if (!sdp->sd_args.ar_localflocks)
+ return -EINVAL;
+ return setlease(file, arg, fl);
}
/**
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_number = ip->i_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 ((ip->i_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
return -ENOLCK;
if (sdp->sd_args.ar_localflocks) {
if (IS_GETLK(cmd)) {
- struct file_lock *tmp;
- lock_kernel();
- tmp = posix_test_lock(file, fl);
- fl->fl_type = F_UNLCK;
- if (tmp)
- memcpy(fl, tmp, sizeof(struct file_lock));
- unlock_kernel();
+ posix_test_lock(file, fl);
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);
}
}
+ if (cmd == F_CANCELLK) {
+ /* Hack: */
+ cmd = F_SETLK;
+ fl->fl_type = F_UNLCK;
+ }
if (IS_GETLK(cmd))
return gfs2_lm_plock_get(sdp, &name, file, fl);
else if (fl->fl_type == F_UNLCK)
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);
- struct gfs2_holder gh;
- ssize_t retval;
-
- atomic_inc(&ip->i_sbd->sd_ops_file);
-
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
-
- retval = gfs2_glock_nq_atime(&gh);
- if (retval)
- goto out;
-
- if (gfs2_is_jdata(ip))
- retval = -EOPNOTSUPP;
- else
- retval = generic_file_sendfile(in_file, offset, count, actor,
- target);
-
- gfs2_glock_dq(&gh);
-
- out:
- gfs2_holder_uninit(&gh);
-
- return retval;
-}
-
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_path.dentry->d_inode);
struct gfs2_glock *gl;
unsigned int state;
int flags;
int error = 0;
state = (fl->fl_type == F_WRLCK) ? LM_ST_EXCLUSIVE : LM_ST_SHARED;
- flags = ((IS_SETLKW(cmd)) ? 0 : LM_FLAG_TRY) | GL_EXACT | GL_NOCACHE;
+ 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) {
goto out;
gfs2_glock_hold(gl);
flock_lock_file_wait(file,
- &(struct file_lock){.fl_type = F_UNLCK});
+ &(struct file_lock){.fl_type = F_UNLCK});
gfs2_glock_dq_uninit(fl_gh);
} else {
- error = gfs2_glock_get(ip->i_sbd,
- ip->i_num.no_addr, &gfs2_flock_glops,
+ error = gfs2_glock_get(GFS2_SB(&ip->i_inode),
+ ip->i_no_addr, &gfs2_flock_glops,
CREATE, &gl);
if (error)
goto out;
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);
-
+out:
+ 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;
- if ((ip->i_di.di_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
+ if ((ip->i_inode.i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
return -ENOLCK;
if (sdp->sd_args.ar_localflocks)
if (fl->fl_type == F_UNLCK) {
do_unflock(file, fl);
return 0;
- } else
+ } else {
return do_flock(file, cmd, fl);
+ }
}
-struct file_operations gfs2_file_fops = {
- .llseek = gfs2_llseek,
- .read = gfs2_read,
- .write = gfs2_write,
- .ioctl = gfs2_ioctl,
- .mmap = gfs2_mmap,
- .open = gfs2_open,
- .release = gfs2_close,
- .fsync = gfs2_fsync,
- .lock = gfs2_lock,
- .sendfile = gfs2_sendfile,
- .flock = gfs2_flock,
+const struct file_operations gfs2_file_fops = {
+ .llseek = gfs2_llseek,
+ .read = do_sync_read,
+ .aio_read = generic_file_aio_read,
+ .write = do_sync_write,
+ .aio_write = generic_file_aio_write,
+ .unlocked_ioctl = gfs2_ioctl,
+ .mmap = gfs2_mmap,
+ .open = gfs2_open,
+ .release = gfs2_close,
+ .fsync = gfs2_fsync,
+ .lock = gfs2_lock,
+ .flock = gfs2_flock,
+ .splice_read = generic_file_splice_read,
+ .splice_write = generic_file_splice_write,
+ .setlease = gfs2_setlease,
};
-struct file_operations gfs2_dir_fops = {
- .readdir = gfs2_readdir,
- .ioctl = gfs2_ioctl,
- .open = gfs2_open,
- .release = gfs2_close,
- .fsync = gfs2_fsync,
- .lock = gfs2_lock,
- .flock = gfs2_flock,
+const struct file_operations gfs2_dir_fops = {
+ .readdir = gfs2_readdir,
+ .unlocked_ioctl = gfs2_ioctl,
+ .open = gfs2_open,
+ .release = gfs2_close,
+ .fsync = gfs2_fsync,
+ .lock = gfs2_lock,
+ .flock = gfs2_flock,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff