Contributors: 27
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Dave Kleikamp |
1330 |
72.60% |
30 |
32.26% |
| Christoph Hellwig |
127 |
6.93% |
19 |
20.43% |
| David Howells |
58 |
3.17% |
1 |
1.08% |
| Marco Stornelli |
52 |
2.84% |
1 |
1.08% |
| Nicholas Piggin |
45 |
2.46% |
2 |
2.15% |
| Al Viro |
41 |
2.24% |
6 |
6.45% |
| Andrew Morton |
38 |
2.07% |
8 |
8.60% |
| Matthew Wilcox |
23 |
1.26% |
4 |
4.30% |
| Dmitriy Monakhov |
18 |
0.98% |
2 |
2.15% |
| Andrey V. Savochkin |
15 |
0.82% |
1 |
1.08% |
| Ingo Molnar |
12 |
0.66% |
1 |
1.08% |
| Haimin Zhang |
11 |
0.60% |
1 |
1.08% |
| Chuck Lever |
10 |
0.55% |
1 |
1.08% |
| Badari Pulavarty |
8 |
0.44% |
2 |
2.15% |
| Mark Fasheh |
7 |
0.38% |
1 |
1.08% |
| Aneesh Kumar K.V |
6 |
0.33% |
1 |
1.08% |
| Pavel Skripkin |
6 |
0.33% |
1 |
1.08% |
| Jeff Layton |
5 |
0.27% |
2 |
2.15% |
| Omar Sandoval |
5 |
0.27% |
1 |
1.08% |
| Linus Torvalds (pre-git) |
3 |
0.16% |
1 |
1.08% |
| Deepa Dinamani |
3 |
0.16% |
1 |
1.08% |
| Johannes Weiner |
2 |
0.11% |
1 |
1.08% |
| Kent Overstreet |
2 |
0.11% |
1 |
1.08% |
| Thomas Gleixner |
2 |
0.11% |
1 |
1.08% |
| Jan Kara |
1 |
0.05% |
1 |
1.08% |
| Joe Perches |
1 |
0.05% |
1 |
1.08% |
| Richard Knutsson |
1 |
0.05% |
1 |
1.08% |
| Total |
1832 |
|
93 |
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) International Business Machines Corp., 2000-2004
* Portions Copyright (C) Christoph Hellwig, 2001-2002
*/
#include <linux/fs.h>
#include <linux/mpage.h>
#include <linux/buffer_head.h>
#include <linux/pagemap.h>
#include <linux/quotaops.h>
#include <linux/uio.h>
#include <linux/writeback.h>
#include "jfs_incore.h"
#include "jfs_inode.h"
#include "jfs_filsys.h"
#include "jfs_imap.h"
#include "jfs_extent.h"
#include "jfs_unicode.h"
#include "jfs_debug.h"
#include "jfs_dmap.h"
struct inode *jfs_iget(struct super_block *sb, unsigned long ino)
{
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)) {
inode->i_op = &jfs_file_inode_operations;
inode->i_fop = &jfs_file_operations;
inode->i_mapping->a_ops = &jfs_aops;
} else if (S_ISDIR(inode->i_mode)) {
inode->i_op = &jfs_dir_inode_operations;
inode->i_fop = &jfs_dir_operations;
} else if (S_ISLNK(inode->i_mode)) {
if (inode->i_size >= IDATASIZE) {
inode->i_op = &page_symlink_inode_operations;
inode_nohighmem(inode);
inode->i_mapping->a_ops = &jfs_aops;
} else {
inode->i_op = &jfs_fast_symlink_inode_operations;
inode->i_link = JFS_IP(inode)->i_inline;
/*
* The inline data should be null-terminated, but
* don't let on-disk corruption crash the kernel
*/
inode->i_link[inode->i_size] = '\0';
}
} else {
inode->i_op = &jfs_file_inode_operations;
init_special_inode(inode, inode->i_mode, inode->i_rdev);
}
unlock_new_inode(inode);
return inode;
}
/*
* Workhorse of both fsync & write_inode
*/
int jfs_commit_inode(struct inode *inode, int wait)
{
int rc = 0;
tid_t tid;
static int noisy = 5;
jfs_info("In jfs_commit_inode, inode = 0x%p", inode);
/*
* Don't commit if inode has been committed since last being
* marked dirty, or if it has been deleted.
*/
if (inode->i_nlink == 0 || !test_cflag(COMMIT_Dirty, inode))
return 0;
if (isReadOnly(inode)) {
/* kernel allows writes to devices on read-only
* partitions and may think inode is dirty
*/
if (!special_file(inode->i_mode) && noisy) {
jfs_err("jfs_commit_inode(0x%p) called on read-only volume",
inode);
jfs_err("Is remount racy?");
noisy--;
}
return 0;
}
tid = txBegin(inode->i_sb, COMMIT_INODE);
mutex_lock(&JFS_IP(inode)->commit_mutex);
/*
* Retest inode state after taking commit_mutex
*/
if (inode->i_nlink && test_cflag(COMMIT_Dirty, inode))
rc = txCommit(tid, 1, &inode, wait ? COMMIT_SYNC : 0);
txEnd(tid);
mutex_unlock(&JFS_IP(inode)->commit_mutex);
return rc;
}
int jfs_write_inode(struct inode *inode, struct writeback_control *wbc)
{
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.
* It has been committed since the last change, but was still
* on the dirty inode list.
*/
if (!test_cflag(COMMIT_Dirty, inode)) {
/* Make sure committed changes hit the disk */
jfs_flush_journal(JFS_SBI(inode->i_sb)->log, wait);
return 0;
}
if (jfs_commit_inode(inode, wait)) {
jfs_err("jfs_write_inode: jfs_commit_inode failed!");
return -EIO;
} else
return 0;
}
void jfs_evict_inode(struct inode *inode)
{
struct jfs_inode_info *ji = JFS_IP(inode);
jfs_info("In jfs_evict_inode, inode = 0x%p", inode);
if (!inode->i_nlink && !is_bad_inode(inode)) {
dquot_initialize(inode);
if (JFS_IP(inode)->fileset == FILESYSTEM_I) {
struct inode *ipimap = JFS_SBI(inode->i_sb)->ipimap;
truncate_inode_pages_final(&inode->i_data);
if (test_cflag(COMMIT_Freewmap, inode))
jfs_free_zero_link(inode);
if (ipimap && JFS_IP(ipimap)->i_imap)
diFree(inode);
/*
* Free the inode from the quota allocation.
*/
dquot_free_inode(inode);
}
} else {
truncate_inode_pages_final(&inode->i_data);
}
clear_inode(inode);
dquot_drop(inode);
BUG_ON(!list_empty(&ji->anon_inode_list));
spin_lock_irq(&ji->ag_lock);
if (ji->active_ag != -1) {
struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
atomic_dec(&bmap->db_active[ji->active_ag]);
ji->active_ag = -1;
}
spin_unlock_irq(&ji->ag_lock);
}
void jfs_dirty_inode(struct inode *inode, int flags)
{
static int noisy = 5;
if (isReadOnly(inode)) {
if (!special_file(inode->i_mode) && noisy) {
/* kernel allows writes to devices on read-only
* partitions and may try to mark inode dirty
*/
jfs_err("jfs_dirty_inode called on read-only volume");
jfs_err("Is remount racy?");
noisy--;
}
return;
}
set_cflag(COMMIT_Dirty, inode);
}
int jfs_get_block(struct inode *ip, sector_t lblock,
struct buffer_head *bh_result, int create)
{
s64 lblock64 = lblock;
int rc = 0;
xad_t xad;
s64 xaddr;
int xflag;
s32 xlen = bh_result->b_size >> ip->i_blkbits;
/*
* Take appropriate lock on inode
*/
if (create)
IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
else
IREAD_LOCK(ip, RDWRLOCK_NORMAL);
if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&
(!xtLookup(ip, lblock64, xlen, &xflag, &xaddr, &xlen, 0)) &&
xaddr) {
if (xflag & XAD_NOTRECORDED) {
if (!create)
/*
* Allocated but not recorded, read treats
* this as a hole
*/
goto unlock;
XADoffset(&xad, lblock64);
XADlength(&xad, xlen);
XADaddress(&xad, xaddr);
rc = extRecord(ip, &xad);
if (rc)
goto unlock;
set_buffer_new(bh_result);
}
map_bh(bh_result, ip->i_sb, xaddr);
bh_result->b_size = xlen << ip->i_blkbits;
goto unlock;
}
if (!create)
goto unlock;
/*
* Allocate a new block
*/
if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
goto unlock;
rc = extAlloc(ip, xlen, lblock64, &xad, false);
if (rc)
goto unlock;
set_buffer_new(bh_result);
map_bh(bh_result, ip->i_sb, addressXAD(&xad));
bh_result->b_size = lengthXAD(&xad) << ip->i_blkbits;
unlock:
/*
* Release lock on inode
*/
if (create)
IWRITE_UNLOCK(ip);
else
IREAD_UNLOCK(ip);
return rc;
}
static int jfs_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
return mpage_writepages(mapping, wbc, jfs_get_block);
}
static int jfs_read_folio(struct file *file, struct folio *folio)
{
return mpage_read_folio(folio, jfs_get_block);
}
static void jfs_readahead(struct readahead_control *rac)
{
mpage_readahead(rac, jfs_get_block);
}
static void jfs_write_failed(struct address_space *mapping, loff_t to)
{
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,
struct page **pagep, void **fsdata)
{
int ret;
ret = block_write_begin(mapping, pos, len, pagep, jfs_get_block);
if (unlikely(ret))
jfs_write_failed(mapping, pos + len);
return ret;
}
static int jfs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied, struct page *page,
void *fsdata)
{
int ret;
ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
if (ret < len)
jfs_write_failed(mapping, pos + len);
return ret;
}
static sector_t jfs_bmap(struct address_space *mapping, sector_t block)
{
return generic_block_bmap(mapping, block, jfs_get_block);
}
static ssize_t jfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
{
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(iocb, inode, iter, jfs_get_block);
/*
* In case of error extending write may have instantiated a few
* blocks outside i_size. Trim these off again.
*/
if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
loff_t isize = i_size_read(inode);
loff_t end = iocb->ki_pos + count;
if (end > isize)
jfs_write_failed(mapping, end);
}
return ret;
}
const struct address_space_operations jfs_aops = {
.dirty_folio = block_dirty_folio,
.invalidate_folio = block_invalidate_folio,
.read_folio = jfs_read_folio,
.readahead = jfs_readahead,
.writepages = jfs_writepages,
.write_begin = jfs_write_begin,
.write_end = jfs_write_end,
.bmap = jfs_bmap,
.direct_IO = jfs_direct_IO,
.migrate_folio = buffer_migrate_folio,
};
/*
* Guts of jfs_truncate. Called with locks already held. Can be called
* with directory for truncating directory index table.
*/
void jfs_truncate_nolock(struct inode *ip, loff_t length)
{
loff_t newsize;
tid_t tid;
ASSERT(length >= 0);
if (test_cflag(COMMIT_Nolink, ip)) {
xtTruncate(0, ip, length, COMMIT_WMAP);
return;
}
do {
tid = txBegin(ip->i_sb, 0);
/*
* The commit_mutex cannot be taken before txBegin.
* txBegin may block and there is a chance the inode
* could be marked dirty and need to be committed
* before txBegin unblocks
*/
mutex_lock(&JFS_IP(ip)->commit_mutex);
newsize = xtTruncate(tid, ip, length,
COMMIT_TRUNCATE | COMMIT_PWMAP);
if (newsize < 0) {
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
break;
}
inode_set_mtime_to_ts(ip, inode_set_ctime_current(ip));
mark_inode_dirty(ip);
txCommit(tid, 1, &ip, 0);
txEnd(tid);
mutex_unlock(&JFS_IP(ip)->commit_mutex);
} while (newsize > length); /* Truncate isn't always atomic */
}
void jfs_truncate(struct inode *ip)
{
jfs_info("jfs_truncate: size = 0x%lx", (ulong) ip->i_size);
block_truncate_page(ip->i_mapping, ip->i_size, jfs_get_block);
IWRITE_LOCK(ip, RDWRLOCK_NORMAL);
jfs_truncate_nolock(ip, ip->i_size);
IWRITE_UNLOCK(ip);
}