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Diffstat (limited to 'fs/jfs/inode.c')
-rw-r--r--fs/jfs/inode.c144
1 files changed, 101 insertions, 43 deletions
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index a223cf4faa9..bd3df1ca3c9 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -4,16 +4,16 @@
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
- *
+ *
* 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 the Free Software
+ * along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
@@ -22,6 +22,8 @@
#include <linux/buffer_head.h>
#include <linux/pagemap.h>
#include <linux/quotaops.h>
+#include <linux/writeback.h>
+#include <linux/aio.h>
#include "jfs_incore.h"
#include "jfs_inode.h"
#include "jfs_filsys.h"
@@ -31,11 +33,21 @@
#include "jfs_debug.h"
-void jfs_read_inode(struct inode *inode)
+struct inode *jfs_iget(struct super_block *sb, unsigned long ino)
{
- if (diRead(inode)) {
- make_bad_inode(inode);
- return;
+ struct inode *inode;
+ int ret;
+
+ inode = iget_locked(sb, ino);
+ if (!inode)
+ return ERR_PTR(-ENOMEM);
+ if (!(inode->i_state & I_NEW))
+ return inode;
+
+ ret = diRead(inode);
+ if (ret < 0) {
+ iget_failed(inode);
+ return ERR_PTR(ret);
}
if (S_ISREG(inode->i_mode)) {
@@ -49,13 +61,20 @@ void jfs_read_inode(struct inode *inode)
if (inode->i_size >= IDATASIZE) {
inode->i_op = &page_symlink_inode_operations;
inode->i_mapping->a_ops = &jfs_aops;
- } else
- inode->i_op = &jfs_symlink_inode_operations;
+ } else {
+ inode->i_op = &jfs_fast_symlink_inode_operations;
+ /*
+ * The inline data should be null-terminated, but
+ * don't let on-disk corruption crash the kernel
+ */
+ JFS_IP(inode)->i_inline[inode->i_size] = '\0';
+ }
} else {
inode->i_op = &jfs_file_inode_operations;
init_special_inode(inode, inode->i_mode, inode->i_rdev);
}
- jfs_set_inode_flags(inode);
+ unlock_new_inode(inode);
+ return inode;
}
/*
@@ -103,9 +122,11 @@ int jfs_commit_inode(struct inode *inode, int wait)
return rc;
}
-int jfs_write_inode(struct inode *inode, int wait)
+int jfs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
- if (test_cflag(COMMIT_Nolink, inode))
+ int wait = wbc->sync_mode == WB_SYNC_ALL;
+
+ if (inode->i_nlink == 0)
return 0;
/*
* If COMMIT_DIRTY is not set, the inode isn't really dirty.
@@ -125,31 +146,35 @@ int jfs_write_inode(struct inode *inode, int wait)
return 0;
}
-void jfs_delete_inode(struct inode *inode)
+void jfs_evict_inode(struct inode *inode)
{
- jfs_info("In jfs_delete_inode, inode = 0x%p", inode);
+ jfs_info("In jfs_evict_inode, inode = 0x%p", inode);
- if (!is_bad_inode(inode) &&
- (JFS_IP(inode)->fileset == FILESYSTEM_I)) {
- truncate_inode_pages(&inode->i_data, 0);
+ if (!inode->i_nlink && !is_bad_inode(inode)) {
+ dquot_initialize(inode);
- if (test_cflag(COMMIT_Freewmap, inode))
- jfs_free_zero_link(inode);
+ if (JFS_IP(inode)->fileset == FILESYSTEM_I) {
+ truncate_inode_pages_final(&inode->i_data);
- diFree(inode);
+ if (test_cflag(COMMIT_Freewmap, inode))
+ jfs_free_zero_link(inode);
- /*
- * Free the inode from the quota allocation.
- */
- DQUOT_INIT(inode);
- DQUOT_FREE_INODE(inode);
- DQUOT_DROP(inode);
- }
+ diFree(inode);
+ /*
+ * Free the inode from the quota allocation.
+ */
+ dquot_initialize(inode);
+ dquot_free_inode(inode);
+ }
+ } else {
+ truncate_inode_pages_final(&inode->i_data);
+ }
clear_inode(inode);
+ dquot_drop(inode);
}
-void jfs_dirty_inode(struct inode *inode)
+void jfs_dirty_inode(struct inode *inode, int flags)
{
static int noisy = 5;
@@ -182,9 +207,9 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
* Take appropriate lock on inode
*/
if (create)
- IWRITE_LOCK(ip);
+ IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
else
- IREAD_LOCK(ip);
+ IREAD_LOCK(ip, RDWRLOCK_NORMAL);
if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&
(!xtLookup(ip, lblock64, xlen, &xflag, &xaddr, &xlen, 0)) &&
@@ -227,7 +252,7 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
#ifdef _JFS_4K
if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
goto unlock;
- rc = extAlloc(ip, xlen, lblock64, &xad, FALSE);
+ rc = extAlloc(ip, xlen, lblock64, &xad, false);
if (rc)
goto unlock;
@@ -256,7 +281,7 @@ int jfs_get_block(struct inode *ip, sector_t lblock,
static int jfs_writepage(struct page *page, struct writeback_control *wbc)
{
- return nobh_writepage(page, jfs_get_block, wbc);
+ return block_write_full_page(page, jfs_get_block, wbc);
}
static int jfs_writepages(struct address_space *mapping,
@@ -276,10 +301,28 @@ static int jfs_readpages(struct file *file, struct address_space *mapping,
return mpage_readpages(mapping, pages, nr_pages, jfs_get_block);
}
-static int jfs_prepare_write(struct file *file,
- struct page *page, unsigned from, unsigned to)
+static void jfs_write_failed(struct address_space *mapping, loff_t to)
{
- return nobh_prepare_write(page, from, to, jfs_get_block);
+ struct inode *inode = mapping->host;
+
+ if (to > inode->i_size) {
+ truncate_pagecache(inode, inode->i_size);
+ jfs_truncate(inode);
+ }
+}
+
+static int jfs_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
+{
+ int ret;
+
+ ret = nobh_write_begin(mapping, pos, len, flags, pagep, fsdata,
+ jfs_get_block);
+ if (unlikely(ret))
+ jfs_write_failed(mapping, pos + len);
+
+ return ret;
}
static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
@@ -288,13 +331,29 @@ static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
}
static ssize_t jfs_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
+ struct address_space *mapping = file->f_mapping;
struct inode *inode = file->f_mapping->host;
+ size_t count = iov_iter_count(iter);
+ ssize_t ret;
+
+ ret = blockdev_direct_IO(rw, iocb, inode, iter, offset, jfs_get_block);
+
+ /*
+ * In case of error extending write may have instantiated a few
+ * blocks outside i_size. Trim these off again.
+ */
+ if (unlikely((rw & WRITE) && ret < 0)) {
+ loff_t isize = i_size_read(inode);
+ loff_t end = offset + count;
+
+ if (end > isize)
+ jfs_write_failed(mapping, end);
+ }
- return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
- offset, nr_segs, jfs_get_block, NULL);
+ return ret;
}
const struct address_space_operations jfs_aops = {
@@ -302,9 +361,8 @@ const struct address_space_operations jfs_aops = {
.readpages = jfs_readpages,
.writepage = jfs_writepage,
.writepages = jfs_writepages,
- .sync_page = block_sync_page,
- .prepare_write = jfs_prepare_write,
- .commit_write = nobh_commit_write,
+ .write_begin = jfs_write_begin,
+ .write_end = nobh_write_end,
.bmap = jfs_bmap,
.direct_IO = jfs_direct_IO,
};
@@ -357,9 +415,9 @@ void jfs_truncate(struct inode *ip)
{
jfs_info("jfs_truncate: size = 0x%lx", (ulong) ip->i_size);
- nobh_truncate_page(ip->i_mapping, ip->i_size);
+ nobh_truncate_page(ip->i_mapping, ip->i_size, jfs_get_block);
- IWRITE_LOCK(ip);
+ IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
jfs_truncate_nolock(ip, ip->i_size);
IWRITE_UNLOCK(ip);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 09:40:02 +0000