mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-26 22:24:09 +08:00
b8e1aabf21
Another case where list_del should be list_del_init. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
1526 lines
36 KiB
C
1526 lines
36 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 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.
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "lm_interface.h"
|
|
#include "incore.h"
|
|
#include "glock.h"
|
|
#include "glops.h"
|
|
#include "lops.h"
|
|
#include "meta_io.h"
|
|
#include "quota.h"
|
|
#include "rgrp.h"
|
|
#include "super.h"
|
|
#include "trans.h"
|
|
#include "ops_file.h"
|
|
#include "util.h"
|
|
|
|
#define BFITNOENT 0xFFFFFFFF
|
|
|
|
/*
|
|
* These routines are used by the resource group routines (rgrp.c)
|
|
* to keep track of block allocation. Each block is represented by two
|
|
* bits. So, each byte represents GFS2_NBBY (i.e. 4) blocks.
|
|
*
|
|
* 0 = Free
|
|
* 1 = Used (not metadata)
|
|
* 2 = Unlinked (still in use) inode
|
|
* 3 = Used (metadata)
|
|
*/
|
|
|
|
static const char valid_change[16] = {
|
|
/* current */
|
|
/* n */ 0, 1, 1, 1,
|
|
/* e */ 1, 0, 0, 0,
|
|
/* w */ 0, 0, 0, 1,
|
|
1, 0, 0, 0
|
|
};
|
|
|
|
/**
|
|
* gfs2_setbit - Set a bit in the bitmaps
|
|
* @buffer: the buffer that holds the bitmaps
|
|
* @buflen: the length (in bytes) of the buffer
|
|
* @block: the block to set
|
|
* @new_state: the new state of the block
|
|
*
|
|
*/
|
|
|
|
static void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buffer,
|
|
unsigned int buflen, uint32_t block,
|
|
unsigned char new_state)
|
|
{
|
|
unsigned char *byte, *end, cur_state;
|
|
unsigned int bit;
|
|
|
|
byte = buffer + (block / GFS2_NBBY);
|
|
bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
|
|
end = buffer + buflen;
|
|
|
|
gfs2_assert(rgd->rd_sbd, byte < end);
|
|
|
|
cur_state = (*byte >> bit) & GFS2_BIT_MASK;
|
|
|
|
if (valid_change[new_state * 4 + cur_state]) {
|
|
*byte ^= cur_state << bit;
|
|
*byte |= new_state << bit;
|
|
} else
|
|
gfs2_consist_rgrpd(rgd);
|
|
}
|
|
|
|
/**
|
|
* gfs2_testbit - test a bit in the bitmaps
|
|
* @buffer: the buffer that holds the bitmaps
|
|
* @buflen: the length (in bytes) of the buffer
|
|
* @block: the block to read
|
|
*
|
|
*/
|
|
|
|
static unsigned char gfs2_testbit(struct gfs2_rgrpd *rgd, unsigned char *buffer,
|
|
unsigned int buflen, uint32_t block)
|
|
{
|
|
unsigned char *byte, *end, cur_state;
|
|
unsigned int bit;
|
|
|
|
byte = buffer + (block / GFS2_NBBY);
|
|
bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
|
|
end = buffer + buflen;
|
|
|
|
gfs2_assert(rgd->rd_sbd, byte < end);
|
|
|
|
cur_state = (*byte >> bit) & GFS2_BIT_MASK;
|
|
|
|
return cur_state;
|
|
}
|
|
|
|
/**
|
|
* gfs2_bitfit - Search an rgrp's bitmap buffer to find a bit-pair representing
|
|
* a block in a given allocation state.
|
|
* @buffer: the buffer that holds the bitmaps
|
|
* @buflen: the length (in bytes) of the buffer
|
|
* @goal: start search at this block's bit-pair (within @buffer)
|
|
* @old_state: GFS2_BLKST_XXX the state of the block we're looking for;
|
|
* bit 0 = alloc(1)/free(0), bit 1 = meta(1)/data(0)
|
|
*
|
|
* Scope of @goal and returned block number is only within this bitmap buffer,
|
|
* not entire rgrp or filesystem. @buffer will be offset from the actual
|
|
* beginning of a bitmap block buffer, skipping any header structures.
|
|
*
|
|
* Return: the block number (bitmap buffer scope) that was found
|
|
*/
|
|
|
|
static uint32_t gfs2_bitfit(struct gfs2_rgrpd *rgd, unsigned char *buffer,
|
|
unsigned int buflen, uint32_t goal,
|
|
unsigned char old_state)
|
|
{
|
|
unsigned char *byte, *end, alloc;
|
|
uint32_t blk = goal;
|
|
unsigned int bit;
|
|
|
|
byte = buffer + (goal / GFS2_NBBY);
|
|
bit = (goal % GFS2_NBBY) * GFS2_BIT_SIZE;
|
|
end = buffer + buflen;
|
|
alloc = (old_state & 1) ? 0 : 0x55;
|
|
|
|
while (byte < end) {
|
|
if ((*byte & 0x55) == alloc) {
|
|
blk += (8 - bit) >> 1;
|
|
|
|
bit = 0;
|
|
byte++;
|
|
|
|
continue;
|
|
}
|
|
|
|
if (((*byte >> bit) & GFS2_BIT_MASK) == old_state)
|
|
return blk;
|
|
|
|
bit += GFS2_BIT_SIZE;
|
|
if (bit >= 8) {
|
|
bit = 0;
|
|
byte++;
|
|
}
|
|
|
|
blk++;
|
|
}
|
|
|
|
return BFITNOENT;
|
|
}
|
|
|
|
/**
|
|
* gfs2_bitcount - count the number of bits in a certain state
|
|
* @buffer: the buffer that holds the bitmaps
|
|
* @buflen: the length (in bytes) of the buffer
|
|
* @state: the state of the block we're looking for
|
|
*
|
|
* Returns: The number of bits
|
|
*/
|
|
|
|
static uint32_t gfs2_bitcount(struct gfs2_rgrpd *rgd, unsigned char *buffer,
|
|
unsigned int buflen, unsigned char state)
|
|
{
|
|
unsigned char *byte = buffer;
|
|
unsigned char *end = buffer + buflen;
|
|
unsigned char state1 = state << 2;
|
|
unsigned char state2 = state << 4;
|
|
unsigned char state3 = state << 6;
|
|
uint32_t count = 0;
|
|
|
|
for (; byte < end; byte++) {
|
|
if (((*byte) & 0x03) == state)
|
|
count++;
|
|
if (((*byte) & 0x0C) == state1)
|
|
count++;
|
|
if (((*byte) & 0x30) == state2)
|
|
count++;
|
|
if (((*byte) & 0xC0) == state3)
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
/**
|
|
* gfs2_rgrp_verify - Verify that a resource group is consistent
|
|
* @sdp: the filesystem
|
|
* @rgd: the rgrp
|
|
*
|
|
*/
|
|
|
|
void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
struct gfs2_bitmap *bi = NULL;
|
|
uint32_t length = rgd->rd_ri.ri_length;
|
|
uint32_t count[4], tmp;
|
|
int buf, x;
|
|
|
|
memset(count, 0, 4 * sizeof(uint32_t));
|
|
|
|
/* Count # blocks in each of 4 possible allocation states */
|
|
for (buf = 0; buf < length; buf++) {
|
|
bi = rgd->rd_bits + buf;
|
|
for (x = 0; x < 4; x++)
|
|
count[x] += gfs2_bitcount(rgd,
|
|
bi->bi_bh->b_data +
|
|
bi->bi_offset,
|
|
bi->bi_len, x);
|
|
}
|
|
|
|
if (count[0] != rgd->rd_rg.rg_free) {
|
|
if (gfs2_consist_rgrpd(rgd))
|
|
fs_err(sdp, "free data mismatch: %u != %u\n",
|
|
count[0], rgd->rd_rg.rg_free);
|
|
return;
|
|
}
|
|
|
|
tmp = rgd->rd_ri.ri_data -
|
|
rgd->rd_rg.rg_free -
|
|
rgd->rd_rg.rg_dinodes;
|
|
if (count[1] + count[2] != tmp) {
|
|
if (gfs2_consist_rgrpd(rgd))
|
|
fs_err(sdp, "used data mismatch: %u != %u\n",
|
|
count[1], tmp);
|
|
return;
|
|
}
|
|
|
|
if (count[3] != rgd->rd_rg.rg_dinodes) {
|
|
if (gfs2_consist_rgrpd(rgd))
|
|
fs_err(sdp, "used metadata mismatch: %u != %u\n",
|
|
count[3], rgd->rd_rg.rg_dinodes);
|
|
return;
|
|
}
|
|
|
|
if (count[2] > count[3]) {
|
|
if (gfs2_consist_rgrpd(rgd))
|
|
fs_err(sdp, "unlinked inodes > inodes: %u\n",
|
|
count[2]);
|
|
return;
|
|
}
|
|
|
|
}
|
|
|
|
static inline int rgrp_contains_block(struct gfs2_rindex *ri, uint64_t block)
|
|
{
|
|
uint64_t first = ri->ri_data0;
|
|
uint64_t last = first + ri->ri_data;
|
|
return !!(first <= block && block < last);
|
|
}
|
|
|
|
/**
|
|
* gfs2_blk2rgrpd - Find resource group for a given data/meta block number
|
|
* @sdp: The GFS2 superblock
|
|
* @n: The data block number
|
|
*
|
|
* Returns: The resource group, or NULL if not found
|
|
*/
|
|
|
|
struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, uint64_t blk)
|
|
{
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
|
|
list_for_each_entry(rgd, &sdp->sd_rindex_mru_list, rd_list_mru) {
|
|
if (rgrp_contains_block(&rgd->rd_ri, blk)) {
|
|
list_move(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
return rgd;
|
|
}
|
|
}
|
|
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* gfs2_rgrpd_get_first - get the first Resource Group in the filesystem
|
|
* @sdp: The GFS2 superblock
|
|
*
|
|
* Returns: The first rgrp in the filesystem
|
|
*/
|
|
|
|
struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp)
|
|
{
|
|
gfs2_assert(sdp, !list_empty(&sdp->sd_rindex_list));
|
|
return list_entry(sdp->sd_rindex_list.next, struct gfs2_rgrpd, rd_list);
|
|
}
|
|
|
|
/**
|
|
* gfs2_rgrpd_get_next - get the next RG
|
|
* @rgd: A RG
|
|
*
|
|
* Returns: The next rgrp
|
|
*/
|
|
|
|
struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd)
|
|
{
|
|
if (rgd->rd_list.next == &rgd->rd_sbd->sd_rindex_list)
|
|
return NULL;
|
|
return list_entry(rgd->rd_list.next, struct gfs2_rgrpd, rd_list);
|
|
}
|
|
|
|
static void clear_rgrpdi(struct gfs2_sbd *sdp)
|
|
{
|
|
struct list_head *head;
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_glock *gl;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
sdp->sd_rindex_forward = NULL;
|
|
head = &sdp->sd_rindex_recent_list;
|
|
while (!list_empty(head)) {
|
|
rgd = list_entry(head->next, struct gfs2_rgrpd, rd_recent);
|
|
list_del(&rgd->rd_recent);
|
|
}
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
head = &sdp->sd_rindex_list;
|
|
while (!list_empty(head)) {
|
|
rgd = list_entry(head->next, struct gfs2_rgrpd, rd_list);
|
|
gl = rgd->rd_gl;
|
|
|
|
list_del(&rgd->rd_list);
|
|
list_del(&rgd->rd_list_mru);
|
|
|
|
if (gl) {
|
|
gl->gl_object = NULL;
|
|
gfs2_glock_put(gl);
|
|
}
|
|
|
|
kfree(rgd->rd_bits);
|
|
kfree(rgd);
|
|
}
|
|
}
|
|
|
|
void gfs2_clear_rgrpd(struct gfs2_sbd *sdp)
|
|
{
|
|
mutex_lock(&sdp->sd_rindex_mutex);
|
|
clear_rgrpdi(sdp);
|
|
mutex_unlock(&sdp->sd_rindex_mutex);
|
|
}
|
|
|
|
/**
|
|
* gfs2_compute_bitstructs - Compute the bitmap sizes
|
|
* @rgd: The resource group descriptor
|
|
*
|
|
* Calculates bitmap descriptors, one for each block that contains bitmap data
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int compute_bitstructs(struct gfs2_rgrpd *rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
struct gfs2_bitmap *bi;
|
|
uint32_t length = rgd->rd_ri.ri_length; /* # blocks in hdr & bitmap */
|
|
uint32_t bytes_left, bytes;
|
|
int x;
|
|
|
|
if (!length)
|
|
return -EINVAL;
|
|
|
|
rgd->rd_bits = kcalloc(length, sizeof(struct gfs2_bitmap), GFP_NOFS);
|
|
if (!rgd->rd_bits)
|
|
return -ENOMEM;
|
|
|
|
bytes_left = rgd->rd_ri.ri_bitbytes;
|
|
|
|
for (x = 0; x < length; x++) {
|
|
bi = rgd->rd_bits + x;
|
|
|
|
/* small rgrp; bitmap stored completely in header block */
|
|
if (length == 1) {
|
|
bytes = bytes_left;
|
|
bi->bi_offset = sizeof(struct gfs2_rgrp);
|
|
bi->bi_start = 0;
|
|
bi->bi_len = bytes;
|
|
/* header block */
|
|
} else if (x == 0) {
|
|
bytes = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_rgrp);
|
|
bi->bi_offset = sizeof(struct gfs2_rgrp);
|
|
bi->bi_start = 0;
|
|
bi->bi_len = bytes;
|
|
/* last block */
|
|
} else if (x + 1 == length) {
|
|
bytes = bytes_left;
|
|
bi->bi_offset = sizeof(struct gfs2_meta_header);
|
|
bi->bi_start = rgd->rd_ri.ri_bitbytes - bytes_left;
|
|
bi->bi_len = bytes;
|
|
/* other blocks */
|
|
} else {
|
|
bytes = sdp->sd_sb.sb_bsize -
|
|
sizeof(struct gfs2_meta_header);
|
|
bi->bi_offset = sizeof(struct gfs2_meta_header);
|
|
bi->bi_start = rgd->rd_ri.ri_bitbytes - bytes_left;
|
|
bi->bi_len = bytes;
|
|
}
|
|
|
|
bytes_left -= bytes;
|
|
}
|
|
|
|
if (bytes_left) {
|
|
gfs2_consist_rgrpd(rgd);
|
|
return -EIO;
|
|
}
|
|
bi = rgd->rd_bits + (length - 1);
|
|
if ((bi->bi_start + bi->bi_len) * GFS2_NBBY != rgd->rd_ri.ri_data) {
|
|
if (gfs2_consist_rgrpd(rgd)) {
|
|
gfs2_rindex_print(&rgd->rd_ri);
|
|
fs_err(sdp, "start=%u len=%u offset=%u\n",
|
|
bi->bi_start, bi->bi_len, bi->bi_offset);
|
|
}
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_ri_update - Pull in a new resource index from the disk
|
|
* @gl: The glock covering the rindex inode
|
|
*
|
|
* Returns: 0 on successful update, error code otherwise
|
|
*/
|
|
|
|
static int gfs2_ri_update(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct inode *inode = &ip->i_inode;
|
|
struct gfs2_rgrpd *rgd;
|
|
char buf[sizeof(struct gfs2_rindex)];
|
|
struct file_ra_state ra_state;
|
|
uint64_t junk = ip->i_di.di_size;
|
|
int error;
|
|
|
|
if (do_div(junk, sizeof(struct gfs2_rindex))) {
|
|
gfs2_consist_inode(ip);
|
|
return -EIO;
|
|
}
|
|
|
|
clear_rgrpdi(sdp);
|
|
|
|
file_ra_state_init(&ra_state, inode->i_mapping);
|
|
for (sdp->sd_rgrps = 0;; sdp->sd_rgrps++) {
|
|
loff_t pos = sdp->sd_rgrps * sizeof(struct gfs2_rindex);
|
|
error = gfs2_internal_read(ip, &ra_state, buf, &pos,
|
|
sizeof(struct gfs2_rindex));
|
|
if (!error)
|
|
break;
|
|
if (error != sizeof(struct gfs2_rindex)) {
|
|
if (error > 0)
|
|
error = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
rgd = kzalloc(sizeof(struct gfs2_rgrpd), GFP_NOFS);
|
|
error = -ENOMEM;
|
|
if (!rgd)
|
|
goto fail;
|
|
|
|
mutex_init(&rgd->rd_mutex);
|
|
lops_init_le(&rgd->rd_le, &gfs2_rg_lops);
|
|
rgd->rd_sbd = sdp;
|
|
|
|
list_add_tail(&rgd->rd_list, &sdp->sd_rindex_list);
|
|
list_add_tail(&rgd->rd_list_mru, &sdp->sd_rindex_mru_list);
|
|
|
|
gfs2_rindex_in(&rgd->rd_ri, buf);
|
|
error = compute_bitstructs(rgd);
|
|
if (error)
|
|
goto fail;
|
|
|
|
error = gfs2_glock_get(sdp, rgd->rd_ri.ri_addr,
|
|
&gfs2_rgrp_glops, CREATE, &rgd->rd_gl);
|
|
if (error)
|
|
goto fail;
|
|
|
|
rgd->rd_gl->gl_object = rgd;
|
|
rgd->rd_rg_vn = rgd->rd_gl->gl_vn - 1;
|
|
}
|
|
|
|
sdp->sd_rindex_vn = ip->i_gl->gl_vn;
|
|
return 0;
|
|
|
|
fail:
|
|
clear_rgrpdi(sdp);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_rindex_hold - Grab a lock on the rindex
|
|
* @sdp: The GFS2 superblock
|
|
* @ri_gh: the glock holder
|
|
*
|
|
* We grab a lock on the rindex inode to make sure that it doesn't
|
|
* change whilst we are performing an operation. We keep this lock
|
|
* for quite long periods of time compared to other locks. This
|
|
* doesn't matter, since it is shared and it is very, very rarely
|
|
* accessed in the exclusive mode (i.e. only when expanding the filesystem).
|
|
*
|
|
* This makes sure that we're using the latest copy of the resource index
|
|
* special file, which might have been updated if someone expanded the
|
|
* filesystem (via gfs2_grow utility), which adds new resource groups.
|
|
*
|
|
* Returns: 0 on success, error code otherwise
|
|
*/
|
|
|
|
int gfs2_rindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ri_gh)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(sdp->sd_rindex);
|
|
struct gfs2_glock *gl = ip->i_gl;
|
|
int error;
|
|
|
|
error = gfs2_glock_nq_init(gl, LM_ST_SHARED, 0, ri_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
/* Read new copy from disk if we don't have the latest */
|
|
if (sdp->sd_rindex_vn != gl->gl_vn) {
|
|
mutex_lock(&sdp->sd_rindex_mutex);
|
|
if (sdp->sd_rindex_vn != gl->gl_vn) {
|
|
error = gfs2_ri_update(ip);
|
|
if (error)
|
|
gfs2_glock_dq_uninit(ri_gh);
|
|
}
|
|
mutex_unlock(&sdp->sd_rindex_mutex);
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* gfs2_rgrp_bh_get - Read in a RG's header and bitmaps
|
|
* @rgd: the struct gfs2_rgrpd describing the RG to read in
|
|
*
|
|
* Read in all of a Resource Group's header and bitmap blocks.
|
|
* Caller must eventually call gfs2_rgrp_relse() to free the bitmaps.
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_rgrp_bh_get(struct gfs2_rgrpd *rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
struct gfs2_glock *gl = rgd->rd_gl;
|
|
unsigned int length = rgd->rd_ri.ri_length;
|
|
struct gfs2_bitmap *bi;
|
|
unsigned int x, y;
|
|
int error;
|
|
|
|
mutex_lock(&rgd->rd_mutex);
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
if (rgd->rd_bh_count) {
|
|
rgd->rd_bh_count++;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
mutex_unlock(&rgd->rd_mutex);
|
|
return 0;
|
|
}
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
for (x = 0; x < length; x++) {
|
|
bi = rgd->rd_bits + x;
|
|
error = gfs2_meta_read(gl, rgd->rd_ri.ri_addr + x, DIO_START,
|
|
&bi->bi_bh);
|
|
if (error)
|
|
goto fail;
|
|
}
|
|
|
|
for (y = length; y--;) {
|
|
bi = rgd->rd_bits + y;
|
|
error = gfs2_meta_reread(sdp, bi->bi_bh, DIO_WAIT);
|
|
if (error)
|
|
goto fail;
|
|
if (gfs2_metatype_check(sdp, bi->bi_bh, y ? GFS2_METATYPE_RB :
|
|
GFS2_METATYPE_RG)) {
|
|
error = -EIO;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (rgd->rd_rg_vn != gl->gl_vn) {
|
|
gfs2_rgrp_in(&rgd->rd_rg, (rgd->rd_bits[0].bi_bh)->b_data);
|
|
rgd->rd_rg_vn = gl->gl_vn;
|
|
}
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
rgd->rd_free_clone = rgd->rd_rg.rg_free;
|
|
rgd->rd_bh_count++;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
mutex_unlock(&rgd->rd_mutex);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
while (x--) {
|
|
bi = rgd->rd_bits + x;
|
|
brelse(bi->bi_bh);
|
|
bi->bi_bh = NULL;
|
|
gfs2_assert_warn(sdp, !bi->bi_clone);
|
|
}
|
|
mutex_unlock(&rgd->rd_mutex);
|
|
|
|
return error;
|
|
}
|
|
|
|
void gfs2_rgrp_bh_hold(struct gfs2_rgrpd *rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
|
|
rgd->rd_bh_count++;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
}
|
|
|
|
/**
|
|
* gfs2_rgrp_bh_put - Release RG bitmaps read in with gfs2_rgrp_bh_get()
|
|
* @rgd: the struct gfs2_rgrpd describing the RG to read in
|
|
*
|
|
*/
|
|
|
|
void gfs2_rgrp_bh_put(struct gfs2_rgrpd *rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
int x, length = rgd->rd_ri.ri_length;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
gfs2_assert_warn(rgd->rd_sbd, rgd->rd_bh_count);
|
|
if (--rgd->rd_bh_count) {
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
return;
|
|
}
|
|
|
|
for (x = 0; x < length; x++) {
|
|
struct gfs2_bitmap *bi = rgd->rd_bits + x;
|
|
kfree(bi->bi_clone);
|
|
bi->bi_clone = NULL;
|
|
brelse(bi->bi_bh);
|
|
bi->bi_bh = NULL;
|
|
}
|
|
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
}
|
|
|
|
void gfs2_rgrp_repolish_clones(struct gfs2_rgrpd *rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
unsigned int length = rgd->rd_ri.ri_length;
|
|
unsigned int x;
|
|
|
|
for (x = 0; x < length; x++) {
|
|
struct gfs2_bitmap *bi = rgd->rd_bits + x;
|
|
if (!bi->bi_clone)
|
|
continue;
|
|
memcpy(bi->bi_clone + bi->bi_offset,
|
|
bi->bi_bh->b_data + bi->bi_offset, bi->bi_len);
|
|
}
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
rgd->rd_free_clone = rgd->rd_rg.rg_free;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
}
|
|
|
|
/**
|
|
* gfs2_alloc_get - get the struct gfs2_alloc structure for an inode
|
|
* @ip: the incore GFS2 inode structure
|
|
*
|
|
* Returns: the struct gfs2_alloc
|
|
*/
|
|
|
|
struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
|
|
/* FIXME: Should assert that the correct locks are held here... */
|
|
memset(al, 0, sizeof(*al));
|
|
return al;
|
|
}
|
|
|
|
/**
|
|
* gfs2_alloc_put - throw away the struct gfs2_alloc for an inode
|
|
* @ip: the inode
|
|
*
|
|
*/
|
|
|
|
void gfs2_alloc_put(struct gfs2_inode *ip)
|
|
{
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* try_rgrp_fit - See if a given reservation will fit in a given RG
|
|
* @rgd: the RG data
|
|
* @al: the struct gfs2_alloc structure describing the reservation
|
|
*
|
|
* If there's room for the requested blocks to be allocated from the RG:
|
|
* Sets the $al_reserved_data field in @al.
|
|
* Sets the $al_reserved_meta field in @al.
|
|
* Sets the $al_rgd field in @al.
|
|
*
|
|
* Returns: 1 on success (it fits), 0 on failure (it doesn't fit)
|
|
*/
|
|
|
|
static int try_rgrp_fit(struct gfs2_rgrpd *rgd, struct gfs2_alloc *al)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
int ret = 0;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
if (rgd->rd_free_clone >= al->al_requested) {
|
|
al->al_rgd = rgd;
|
|
ret = 1;
|
|
}
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* recent_rgrp_first - get first RG from "recent" list
|
|
* @sdp: The GFS2 superblock
|
|
* @rglast: address of the rgrp used last
|
|
*
|
|
* Returns: The first rgrp in the recent list
|
|
*/
|
|
|
|
static struct gfs2_rgrpd *recent_rgrp_first(struct gfs2_sbd *sdp,
|
|
uint64_t rglast)
|
|
{
|
|
struct gfs2_rgrpd *rgd = NULL;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
|
|
if (list_empty(&sdp->sd_rindex_recent_list))
|
|
goto out;
|
|
|
|
if (!rglast)
|
|
goto first;
|
|
|
|
list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
|
|
if (rgd->rd_ri.ri_addr == rglast)
|
|
goto out;
|
|
}
|
|
|
|
first:
|
|
rgd = list_entry(sdp->sd_rindex_recent_list.next, struct gfs2_rgrpd,
|
|
rd_recent);
|
|
out:
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
return rgd;
|
|
}
|
|
|
|
/**
|
|
* recent_rgrp_next - get next RG from "recent" list
|
|
* @cur_rgd: current rgrp
|
|
* @remove:
|
|
*
|
|
* Returns: The next rgrp in the recent list
|
|
*/
|
|
|
|
static struct gfs2_rgrpd *recent_rgrp_next(struct gfs2_rgrpd *cur_rgd,
|
|
int remove)
|
|
{
|
|
struct gfs2_sbd *sdp = cur_rgd->rd_sbd;
|
|
struct list_head *head;
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
|
|
head = &sdp->sd_rindex_recent_list;
|
|
|
|
list_for_each_entry(rgd, head, rd_recent) {
|
|
if (rgd == cur_rgd) {
|
|
if (cur_rgd->rd_recent.next != head)
|
|
rgd = list_entry(cur_rgd->rd_recent.next,
|
|
struct gfs2_rgrpd, rd_recent);
|
|
else
|
|
rgd = NULL;
|
|
|
|
if (remove)
|
|
list_del(&cur_rgd->rd_recent);
|
|
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
rgd = NULL;
|
|
if (!list_empty(head))
|
|
rgd = list_entry(head->next, struct gfs2_rgrpd, rd_recent);
|
|
|
|
out:
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
return rgd;
|
|
}
|
|
|
|
/**
|
|
* recent_rgrp_add - add an RG to tail of "recent" list
|
|
* @new_rgd: The rgrp to add
|
|
*
|
|
*/
|
|
|
|
static void recent_rgrp_add(struct gfs2_rgrpd *new_rgd)
|
|
{
|
|
struct gfs2_sbd *sdp = new_rgd->rd_sbd;
|
|
struct gfs2_rgrpd *rgd;
|
|
unsigned int count = 0;
|
|
unsigned int max = sdp->sd_rgrps / gfs2_jindex_size(sdp);
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
|
|
list_for_each_entry(rgd, &sdp->sd_rindex_recent_list, rd_recent) {
|
|
if (rgd == new_rgd)
|
|
goto out;
|
|
|
|
if (++count >= max)
|
|
goto out;
|
|
}
|
|
list_add_tail(&new_rgd->rd_recent, &sdp->sd_rindex_recent_list);
|
|
|
|
out:
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
}
|
|
|
|
/**
|
|
* forward_rgrp_get - get an rgrp to try next from full list
|
|
* @sdp: The GFS2 superblock
|
|
*
|
|
* Returns: The rgrp to try next
|
|
*/
|
|
|
|
static struct gfs2_rgrpd *forward_rgrp_get(struct gfs2_sbd *sdp)
|
|
{
|
|
struct gfs2_rgrpd *rgd;
|
|
unsigned int journals = gfs2_jindex_size(sdp);
|
|
unsigned int rg = 0, x;
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
|
|
rgd = sdp->sd_rindex_forward;
|
|
if (!rgd) {
|
|
if (sdp->sd_rgrps >= journals)
|
|
rg = sdp->sd_rgrps * sdp->sd_jdesc->jd_jid / journals;
|
|
|
|
for (x = 0, rgd = gfs2_rgrpd_get_first(sdp); x < rg;
|
|
x++, rgd = gfs2_rgrpd_get_next(rgd))
|
|
/* Do Nothing */;
|
|
|
|
sdp->sd_rindex_forward = rgd;
|
|
}
|
|
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
return rgd;
|
|
}
|
|
|
|
/**
|
|
* forward_rgrp_set - set the forward rgrp pointer
|
|
* @sdp: the filesystem
|
|
* @rgd: The new forward rgrp
|
|
*
|
|
*/
|
|
|
|
static void forward_rgrp_set(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd)
|
|
{
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
sdp->sd_rindex_forward = rgd;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
}
|
|
|
|
/**
|
|
* get_local_rgrp - Choose and lock a rgrp for allocation
|
|
* @ip: the inode to reserve space for
|
|
* @rgp: the chosen and locked rgrp
|
|
*
|
|
* Try to acquire rgrp in way which avoids contending with others.
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
static int get_local_rgrp(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrpd *rgd, *begin = NULL;
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
int flags = LM_FLAG_TRY;
|
|
int skipped = 0;
|
|
int loops = 0;
|
|
int error;
|
|
|
|
/* Try recently successful rgrps */
|
|
|
|
rgd = recent_rgrp_first(sdp, ip->i_last_rg_alloc);
|
|
|
|
while (rgd) {
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
|
|
LM_FLAG_TRY, &al->al_rgd_gh);
|
|
switch (error) {
|
|
case 0:
|
|
if (try_rgrp_fit(rgd, al))
|
|
goto out;
|
|
gfs2_glock_dq_uninit(&al->al_rgd_gh);
|
|
rgd = recent_rgrp_next(rgd, 1);
|
|
break;
|
|
|
|
case GLR_TRYFAILED:
|
|
rgd = recent_rgrp_next(rgd, 0);
|
|
break;
|
|
|
|
default:
|
|
return error;
|
|
}
|
|
}
|
|
|
|
/* Go through full list of rgrps */
|
|
|
|
begin = rgd = forward_rgrp_get(sdp);
|
|
|
|
for (;;) {
|
|
error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, flags,
|
|
&al->al_rgd_gh);
|
|
switch (error) {
|
|
case 0:
|
|
if (try_rgrp_fit(rgd, al))
|
|
goto out;
|
|
gfs2_glock_dq_uninit(&al->al_rgd_gh);
|
|
break;
|
|
|
|
case GLR_TRYFAILED:
|
|
skipped++;
|
|
break;
|
|
|
|
default:
|
|
return error;
|
|
}
|
|
|
|
rgd = gfs2_rgrpd_get_next(rgd);
|
|
if (!rgd)
|
|
rgd = gfs2_rgrpd_get_first(sdp);
|
|
|
|
if (rgd == begin) {
|
|
if (++loops >= 2 || !skipped)
|
|
return -ENOSPC;
|
|
flags = 0;
|
|
}
|
|
}
|
|
|
|
out:
|
|
ip->i_last_rg_alloc = rgd->rd_ri.ri_addr;
|
|
|
|
if (begin) {
|
|
recent_rgrp_add(rgd);
|
|
rgd = gfs2_rgrpd_get_next(rgd);
|
|
if (!rgd)
|
|
rgd = gfs2_rgrpd_get_first(sdp);
|
|
forward_rgrp_set(sdp, rgd);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_inplace_reserve_i - Reserve space in the filesystem
|
|
* @ip: the inode to reserve space for
|
|
*
|
|
* Returns: errno
|
|
*/
|
|
|
|
int gfs2_inplace_reserve_i(struct gfs2_inode *ip, char *file, unsigned int line)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
int error;
|
|
|
|
if (gfs2_assert_warn(sdp, al->al_requested))
|
|
return -EINVAL;
|
|
|
|
error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
|
|
if (error)
|
|
return error;
|
|
|
|
error = get_local_rgrp(ip);
|
|
if (error) {
|
|
gfs2_glock_dq_uninit(&al->al_ri_gh);
|
|
return error;
|
|
}
|
|
|
|
al->al_file = file;
|
|
al->al_line = line;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* gfs2_inplace_release - release an inplace reservation
|
|
* @ip: the inode the reservation was taken out on
|
|
*
|
|
* Release a reservation made by gfs2_inplace_reserve().
|
|
*/
|
|
|
|
void gfs2_inplace_release(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
|
|
if (gfs2_assert_warn(sdp, al->al_alloced <= al->al_requested) == -1)
|
|
fs_warn(sdp, "al_alloced = %u, al_requested = %u "
|
|
"al_file = %s, al_line = %u\n",
|
|
al->al_alloced, al->al_requested, al->al_file,
|
|
al->al_line);
|
|
|
|
al->al_rgd = NULL;
|
|
gfs2_glock_dq_uninit(&al->al_rgd_gh);
|
|
gfs2_glock_dq_uninit(&al->al_ri_gh);
|
|
}
|
|
|
|
/**
|
|
* gfs2_get_block_type - Check a block in a RG is of given type
|
|
* @rgd: the resource group holding the block
|
|
* @block: the block number
|
|
*
|
|
* Returns: The block type (GFS2_BLKST_*)
|
|
*/
|
|
|
|
unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, uint64_t block)
|
|
{
|
|
struct gfs2_bitmap *bi = NULL;
|
|
uint32_t length, rgrp_block, buf_block;
|
|
unsigned int buf;
|
|
unsigned char type;
|
|
|
|
length = rgd->rd_ri.ri_length;
|
|
rgrp_block = block - rgd->rd_ri.ri_data0;
|
|
|
|
for (buf = 0; buf < length; buf++) {
|
|
bi = rgd->rd_bits + buf;
|
|
if (rgrp_block < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
|
|
break;
|
|
}
|
|
|
|
gfs2_assert(rgd->rd_sbd, buf < length);
|
|
buf_block = rgrp_block - bi->bi_start * GFS2_NBBY;
|
|
|
|
type = gfs2_testbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
|
|
bi->bi_len, buf_block);
|
|
|
|
return type;
|
|
}
|
|
|
|
/**
|
|
* rgblk_search - find a block in @old_state, change allocation
|
|
* state to @new_state
|
|
* @rgd: the resource group descriptor
|
|
* @goal: the goal block within the RG (start here to search for avail block)
|
|
* @old_state: GFS2_BLKST_XXX the before-allocation state to find
|
|
* @new_state: GFS2_BLKST_XXX the after-allocation block state
|
|
*
|
|
* Walk rgrp's bitmap to find bits that represent a block in @old_state.
|
|
* Add the found bitmap buffer to the transaction.
|
|
* Set the found bits to @new_state to change block's allocation state.
|
|
*
|
|
* This function never fails, because we wouldn't call it unless we
|
|
* know (from reservation results, etc.) that a block is available.
|
|
*
|
|
* Scope of @goal and returned block is just within rgrp, not the whole
|
|
* filesystem.
|
|
*
|
|
* Returns: the block number allocated
|
|
*/
|
|
|
|
static uint32_t rgblk_search(struct gfs2_rgrpd *rgd, uint32_t goal,
|
|
unsigned char old_state, unsigned char new_state)
|
|
{
|
|
struct gfs2_bitmap *bi = NULL;
|
|
uint32_t length = rgd->rd_ri.ri_length;
|
|
uint32_t blk = 0;
|
|
unsigned int buf, x;
|
|
|
|
/* Find bitmap block that contains bits for goal block */
|
|
for (buf = 0; buf < length; buf++) {
|
|
bi = rgd->rd_bits + buf;
|
|
if (goal < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
|
|
break;
|
|
}
|
|
|
|
gfs2_assert(rgd->rd_sbd, buf < length);
|
|
|
|
/* Convert scope of "goal" from rgrp-wide to within found bit block */
|
|
goal -= bi->bi_start * GFS2_NBBY;
|
|
|
|
/* Search (up to entire) bitmap in this rgrp for allocatable block.
|
|
"x <= length", instead of "x < length", because we typically start
|
|
the search in the middle of a bit block, but if we can't find an
|
|
allocatable block anywhere else, we want to be able wrap around and
|
|
search in the first part of our first-searched bit block. */
|
|
for (x = 0; x <= length; x++) {
|
|
if (bi->bi_clone)
|
|
blk = gfs2_bitfit(rgd, bi->bi_clone + bi->bi_offset,
|
|
bi->bi_len, goal, old_state);
|
|
else
|
|
blk = gfs2_bitfit(rgd,
|
|
bi->bi_bh->b_data + bi->bi_offset,
|
|
bi->bi_len, goal, old_state);
|
|
if (blk != BFITNOENT)
|
|
break;
|
|
|
|
/* Try next bitmap block (wrap back to rgrp header if at end) */
|
|
buf = (buf + 1) % length;
|
|
bi = rgd->rd_bits + buf;
|
|
goal = 0;
|
|
}
|
|
|
|
if (gfs2_assert_withdraw(rgd->rd_sbd, x <= length))
|
|
blk = 0;
|
|
|
|
gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
|
|
gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
|
|
bi->bi_len, blk, new_state);
|
|
if (bi->bi_clone)
|
|
gfs2_setbit(rgd, bi->bi_clone + bi->bi_offset,
|
|
bi->bi_len, blk, new_state);
|
|
|
|
return bi->bi_start * GFS2_NBBY + blk;
|
|
}
|
|
|
|
/**
|
|
* rgblk_free - Change alloc state of given block(s)
|
|
* @sdp: the filesystem
|
|
* @bstart: the start of a run of blocks to free
|
|
* @blen: the length of the block run (all must lie within ONE RG!)
|
|
* @new_state: GFS2_BLKST_XXX the after-allocation block state
|
|
*
|
|
* Returns: Resource group containing the block(s)
|
|
*/
|
|
|
|
static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, uint64_t bstart,
|
|
uint32_t blen, unsigned char new_state)
|
|
{
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_bitmap *bi = NULL;
|
|
uint32_t length, rgrp_blk, buf_blk;
|
|
unsigned int buf;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, bstart);
|
|
if (!rgd) {
|
|
if (gfs2_consist(sdp))
|
|
fs_err(sdp, "block = %llu\n", (unsigned long long)bstart);
|
|
return NULL;
|
|
}
|
|
|
|
length = rgd->rd_ri.ri_length;
|
|
|
|
rgrp_blk = bstart - rgd->rd_ri.ri_data0;
|
|
|
|
while (blen--) {
|
|
for (buf = 0; buf < length; buf++) {
|
|
bi = rgd->rd_bits + buf;
|
|
if (rgrp_blk < (bi->bi_start + bi->bi_len) * GFS2_NBBY)
|
|
break;
|
|
}
|
|
|
|
gfs2_assert(rgd->rd_sbd, buf < length);
|
|
|
|
buf_blk = rgrp_blk - bi->bi_start * GFS2_NBBY;
|
|
rgrp_blk++;
|
|
|
|
if (!bi->bi_clone) {
|
|
bi->bi_clone = kmalloc(bi->bi_bh->b_size,
|
|
GFP_NOFS | __GFP_NOFAIL);
|
|
memcpy(bi->bi_clone + bi->bi_offset,
|
|
bi->bi_bh->b_data + bi->bi_offset,
|
|
bi->bi_len);
|
|
}
|
|
gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
|
|
gfs2_setbit(rgd, bi->bi_bh->b_data + bi->bi_offset,
|
|
bi->bi_len, buf_blk, new_state);
|
|
}
|
|
|
|
return rgd;
|
|
}
|
|
|
|
/**
|
|
* gfs2_alloc_data - Allocate a data block
|
|
* @ip: the inode to allocate the data block for
|
|
*
|
|
* Returns: the allocated block
|
|
*/
|
|
|
|
u64 gfs2_alloc_data(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
struct gfs2_rgrpd *rgd = al->al_rgd;
|
|
uint32_t goal, blk;
|
|
uint64_t block;
|
|
|
|
if (rgrp_contains_block(&rgd->rd_ri, ip->i_di.di_goal_data))
|
|
goal = ip->i_di.di_goal_data - rgd->rd_ri.ri_data0;
|
|
else
|
|
goal = rgd->rd_last_alloc_data;
|
|
|
|
blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
|
|
rgd->rd_last_alloc_data = blk;
|
|
|
|
block = rgd->rd_ri.ri_data0 + blk;
|
|
ip->i_di.di_goal_data = block;
|
|
|
|
gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
|
|
rgd->rd_rg.rg_free--;
|
|
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
|
|
al->al_alloced++;
|
|
|
|
gfs2_statfs_change(sdp, 0, -1, 0);
|
|
gfs2_quota_change(ip, +1, ip->i_di.di_uid, ip->i_di.di_gid);
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
rgd->rd_free_clone--;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
return block;
|
|
}
|
|
|
|
/**
|
|
* gfs2_alloc_meta - Allocate a metadata block
|
|
* @ip: the inode to allocate the metadata block for
|
|
*
|
|
* Returns: the allocated block
|
|
*/
|
|
|
|
u64 gfs2_alloc_meta(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_alloc *al = &ip->i_alloc;
|
|
struct gfs2_rgrpd *rgd = al->al_rgd;
|
|
uint32_t goal, blk;
|
|
uint64_t block;
|
|
|
|
if (rgrp_contains_block(&rgd->rd_ri, ip->i_di.di_goal_meta))
|
|
goal = ip->i_di.di_goal_meta - rgd->rd_ri.ri_data0;
|
|
else
|
|
goal = rgd->rd_last_alloc_meta;
|
|
|
|
blk = rgblk_search(rgd, goal, GFS2_BLKST_FREE, GFS2_BLKST_USED);
|
|
rgd->rd_last_alloc_meta = blk;
|
|
|
|
block = rgd->rd_ri.ri_data0 + blk;
|
|
ip->i_di.di_goal_meta = block;
|
|
|
|
gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
|
|
rgd->rd_rg.rg_free--;
|
|
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
|
|
al->al_alloced++;
|
|
|
|
gfs2_statfs_change(sdp, 0, -1, 0);
|
|
gfs2_quota_change(ip, +1, ip->i_di.di_uid, ip->i_di.di_gid);
|
|
gfs2_trans_add_unrevoke(sdp, block);
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
rgd->rd_free_clone--;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
return block;
|
|
}
|
|
|
|
/**
|
|
* gfs2_alloc_di - Allocate a dinode
|
|
* @dip: the directory that the inode is going in
|
|
*
|
|
* Returns: the block allocated
|
|
*/
|
|
|
|
u64 gfs2_alloc_di(struct gfs2_inode *dip, u64 *generation)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
|
|
struct gfs2_alloc *al = &dip->i_alloc;
|
|
struct gfs2_rgrpd *rgd = al->al_rgd;
|
|
u32 blk;
|
|
u64 block;
|
|
|
|
blk = rgblk_search(rgd, rgd->rd_last_alloc_meta,
|
|
GFS2_BLKST_FREE, GFS2_BLKST_DINODE);
|
|
|
|
rgd->rd_last_alloc_meta = blk;
|
|
|
|
block = rgd->rd_ri.ri_data0 + blk;
|
|
|
|
gfs2_assert_withdraw(sdp, rgd->rd_rg.rg_free);
|
|
rgd->rd_rg.rg_free--;
|
|
rgd->rd_rg.rg_dinodes++;
|
|
*generation = rgd->rd_rg.rg_igeneration++;
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
|
|
al->al_alloced++;
|
|
|
|
gfs2_statfs_change(sdp, 0, -1, +1);
|
|
gfs2_trans_add_unrevoke(sdp, block);
|
|
|
|
spin_lock(&sdp->sd_rindex_spin);
|
|
rgd->rd_free_clone--;
|
|
spin_unlock(&sdp->sd_rindex_spin);
|
|
|
|
return block;
|
|
}
|
|
|
|
/**
|
|
* gfs2_free_data - free a contiguous run of data block(s)
|
|
* @ip: the inode these blocks are being freed from
|
|
* @bstart: first block of a run of contiguous blocks
|
|
* @blen: the length of the block run
|
|
*
|
|
*/
|
|
|
|
void gfs2_free_data(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE);
|
|
if (!rgd)
|
|
return;
|
|
|
|
rgd->rd_rg.rg_free += blen;
|
|
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
|
|
gfs2_trans_add_rg(rgd);
|
|
|
|
gfs2_statfs_change(sdp, 0, +blen, 0);
|
|
gfs2_quota_change(ip, -(int64_t)blen,
|
|
ip->i_di.di_uid, ip->i_di.di_gid);
|
|
}
|
|
|
|
/**
|
|
* gfs2_free_meta - free a contiguous run of data block(s)
|
|
* @ip: the inode these blocks are being freed from
|
|
* @bstart: first block of a run of contiguous blocks
|
|
* @blen: the length of the block run
|
|
*
|
|
*/
|
|
|
|
void gfs2_free_meta(struct gfs2_inode *ip, uint64_t bstart, uint32_t blen)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
|
|
rgd = rgblk_free(sdp, bstart, blen, GFS2_BLKST_FREE);
|
|
if (!rgd)
|
|
return;
|
|
|
|
rgd->rd_rg.rg_free += blen;
|
|
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
|
|
gfs2_trans_add_rg(rgd);
|
|
|
|
gfs2_statfs_change(sdp, 0, +blen, 0);
|
|
gfs2_quota_change(ip, -(int64_t)blen, ip->i_di.di_uid, ip->i_di.di_gid);
|
|
gfs2_meta_wipe(ip, bstart, blen);
|
|
}
|
|
|
|
void gfs2_unlink_di(struct inode *inode)
|
|
{
|
|
struct gfs2_inode *ip = GFS2_I(inode);
|
|
struct gfs2_sbd *sdp = GFS2_SB(inode);
|
|
struct gfs2_rgrpd *rgd;
|
|
u64 blkno = ip->i_num.no_addr;
|
|
|
|
rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_UNLINKED);
|
|
if (!rgd)
|
|
return;
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
gfs2_trans_add_rg(rgd);
|
|
}
|
|
|
|
static void gfs2_free_uninit_di(struct gfs2_rgrpd *rgd, uint64_t blkno)
|
|
{
|
|
struct gfs2_sbd *sdp = rgd->rd_sbd;
|
|
struct gfs2_rgrpd *tmp_rgd;
|
|
|
|
tmp_rgd = rgblk_free(sdp, blkno, 1, GFS2_BLKST_FREE);
|
|
if (!tmp_rgd)
|
|
return;
|
|
gfs2_assert_withdraw(sdp, rgd == tmp_rgd);
|
|
|
|
if (!rgd->rd_rg.rg_dinodes)
|
|
gfs2_consist_rgrpd(rgd);
|
|
rgd->rd_rg.rg_dinodes--;
|
|
rgd->rd_rg.rg_free++;
|
|
|
|
gfs2_trans_add_bh(rgd->rd_gl, rgd->rd_bits[0].bi_bh, 1);
|
|
gfs2_rgrp_out(&rgd->rd_rg, rgd->rd_bits[0].bi_bh->b_data);
|
|
|
|
gfs2_statfs_change(sdp, 0, +1, -1);
|
|
gfs2_trans_add_rg(rgd);
|
|
}
|
|
|
|
|
|
void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip)
|
|
{
|
|
gfs2_free_uninit_di(rgd, ip->i_num.no_addr);
|
|
gfs2_quota_change(ip, -1, ip->i_di.di_uid, ip->i_di.di_gid);
|
|
gfs2_meta_wipe(ip, ip->i_num.no_addr, 1);
|
|
}
|
|
|
|
/**
|
|
* gfs2_rlist_add - add a RG to a list of RGs
|
|
* @sdp: the filesystem
|
|
* @rlist: the list of resource groups
|
|
* @block: the block
|
|
*
|
|
* Figure out what RG a block belongs to and add that RG to the list
|
|
*
|
|
* FIXME: Don't use NOFAIL
|
|
*
|
|
*/
|
|
|
|
void gfs2_rlist_add(struct gfs2_sbd *sdp, struct gfs2_rgrp_list *rlist,
|
|
uint64_t block)
|
|
{
|
|
struct gfs2_rgrpd *rgd;
|
|
struct gfs2_rgrpd **tmp;
|
|
unsigned int new_space;
|
|
unsigned int x;
|
|
|
|
if (gfs2_assert_warn(sdp, !rlist->rl_ghs))
|
|
return;
|
|
|
|
rgd = gfs2_blk2rgrpd(sdp, block);
|
|
if (!rgd) {
|
|
if (gfs2_consist(sdp))
|
|
fs_err(sdp, "block = %llu\n", (unsigned long long)block);
|
|
return;
|
|
}
|
|
|
|
for (x = 0; x < rlist->rl_rgrps; x++)
|
|
if (rlist->rl_rgd[x] == rgd)
|
|
return;
|
|
|
|
if (rlist->rl_rgrps == rlist->rl_space) {
|
|
new_space = rlist->rl_space + 10;
|
|
|
|
tmp = kcalloc(new_space, sizeof(struct gfs2_rgrpd *),
|
|
GFP_NOFS | __GFP_NOFAIL);
|
|
|
|
if (rlist->rl_rgd) {
|
|
memcpy(tmp, rlist->rl_rgd,
|
|
rlist->rl_space * sizeof(struct gfs2_rgrpd *));
|
|
kfree(rlist->rl_rgd);
|
|
}
|
|
|
|
rlist->rl_space = new_space;
|
|
rlist->rl_rgd = tmp;
|
|
}
|
|
|
|
rlist->rl_rgd[rlist->rl_rgrps++] = rgd;
|
|
}
|
|
|
|
/**
|
|
* gfs2_rlist_alloc - all RGs have been added to the rlist, now allocate
|
|
* and initialize an array of glock holders for them
|
|
* @rlist: the list of resource groups
|
|
* @state: the lock state to acquire the RG lock in
|
|
* @flags: the modifier flags for the holder structures
|
|
*
|
|
* FIXME: Don't use NOFAIL
|
|
*
|
|
*/
|
|
|
|
void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state,
|
|
int flags)
|
|
{
|
|
unsigned int x;
|
|
|
|
rlist->rl_ghs = kcalloc(rlist->rl_rgrps, sizeof(struct gfs2_holder),
|
|
GFP_NOFS | __GFP_NOFAIL);
|
|
for (x = 0; x < rlist->rl_rgrps; x++)
|
|
gfs2_holder_init(rlist->rl_rgd[x]->rd_gl,
|
|
state, flags,
|
|
&rlist->rl_ghs[x]);
|
|
}
|
|
|
|
/**
|
|
* gfs2_rlist_free - free a resource group list
|
|
* @list: the list of resource groups
|
|
*
|
|
*/
|
|
|
|
void gfs2_rlist_free(struct gfs2_rgrp_list *rlist)
|
|
{
|
|
unsigned int x;
|
|
|
|
kfree(rlist->rl_rgd);
|
|
|
|
if (rlist->rl_ghs) {
|
|
for (x = 0; x < rlist->rl_rgrps; x++)
|
|
gfs2_holder_uninit(&rlist->rl_ghs[x]);
|
|
kfree(rlist->rl_ghs);
|
|
}
|
|
}
|
|
|