aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ufs/balloc.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ufs/balloc.c')
-rw-r--r--fs/ufs/balloc.c70
1 files changed, 44 insertions, 26 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index a0376a2c1c29..f80be4c5df9d 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -82,7 +82,8 @@ void ufs_free_fragments(struct inode *inode, u64 fragment, unsigned count)
ufs_error (sb, "ufs_free_fragments",
"bit already cleared for fragment %u", i);
}
-
+
+ inode_sub_bytes(inode, count << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, count);
uspi->cs_total.cs_nffree += count;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, count);
@@ -184,6 +185,7 @@ do_more:
ufs_error(sb, "ufs_free_blocks", "freeing free fragment");
}
ubh_setblock(UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
+ inode_sub_bytes(inode, uspi->s_fpb << uspi->s_fshift);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
ufs_clusteracct (sb, ucpi, blkno, 1);
@@ -398,10 +400,12 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
/*
* There is not enough space for user on the device
*/
- if (!capable(CAP_SYS_RESOURCE) && ufs_freespace(uspi, UFS_MINFREE) <= 0) {
- mutex_unlock(&UFS_SB(sb)->s_lock);
- UFSD("EXIT (FAILED)\n");
- return 0;
+ if (unlikely(ufs_freefrags(uspi) <= uspi->s_root_blocks)) {
+ if (!capable(CAP_SYS_RESOURCE)) {
+ mutex_unlock(&UFS_SB(sb)->s_lock);
+ UFSD("EXIT (FAILED)\n");
+ return 0;
+ }
}
if (goal >= uspi->s_size)
@@ -419,12 +423,12 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
if (result) {
ufs_clear_frags(inode, result + oldcount,
newcount - oldcount, locked_page != NULL);
+ *err = 0;
write_seqlock(&UFS_I(inode)->meta_lock);
ufs_cpu_to_data_ptr(sb, p, result);
- write_sequnlock(&UFS_I(inode)->meta_lock);
- *err = 0;
UFS_I(inode)->i_lastfrag =
max(UFS_I(inode)->i_lastfrag, fragment + count);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
}
mutex_unlock(&UFS_SB(sb)->s_lock);
UFSD("EXIT, result %llu\n", (unsigned long long)result);
@@ -437,8 +441,10 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
result = ufs_add_fragments(inode, tmp, oldcount, newcount);
if (result) {
*err = 0;
+ read_seqlock_excl(&UFS_I(inode)->meta_lock);
UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
fragment + count);
+ read_sequnlock_excl(&UFS_I(inode)->meta_lock);
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
mutex_unlock(&UFS_SB(sb)->s_lock);
@@ -449,39 +455,29 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
/*
* allocate new block and move data
*/
- switch (fs32_to_cpu(sb, usb1->fs_optim)) {
- case UFS_OPTSPACE:
+ if (fs32_to_cpu(sb, usb1->fs_optim) == UFS_OPTSPACE) {
request = newcount;
- if (uspi->s_minfree < 5 || uspi->cs_total.cs_nffree
- > uspi->s_dsize * uspi->s_minfree / (2 * 100))
- break;
- usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
- break;
- default:
- usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
-
- case UFS_OPTTIME:
+ if (uspi->cs_total.cs_nffree < uspi->s_space_to_time)
+ usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
+ } else {
request = uspi->s_fpb;
- if (uspi->cs_total.cs_nffree < uspi->s_dsize *
- (uspi->s_minfree - 2) / 100)
- break;
- usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTTIME);
- break;
+ if (uspi->cs_total.cs_nffree > uspi->s_time_to_space)
+ usb1->fs_optim = cpu_to_fs32(sb, UFS_OPTSPACE);
}
result = ufs_alloc_fragments (inode, cgno, goal, request, err);
if (result) {
ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
locked_page != NULL);
+ mutex_unlock(&UFS_SB(sb)->s_lock);
ufs_change_blocknr(inode, fragment - oldcount, oldcount,
uspi->s_sbbase + tmp,
uspi->s_sbbase + result, locked_page);
+ *err = 0;
write_seqlock(&UFS_I(inode)->meta_lock);
ufs_cpu_to_data_ptr(sb, p, result);
- write_sequnlock(&UFS_I(inode)->meta_lock);
- *err = 0;
UFS_I(inode)->i_lastfrag = max(UFS_I(inode)->i_lastfrag,
fragment + count);
- mutex_unlock(&UFS_SB(sb)->s_lock);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
if (newcount < request)
ufs_free_fragments (inode, result + newcount, request - newcount);
ufs_free_fragments (inode, tmp, oldcount);
@@ -494,6 +490,20 @@ u64 ufs_new_fragments(struct inode *inode, void *p, u64 fragment,
return 0;
}
+static bool try_add_frags(struct inode *inode, unsigned frags)
+{
+ unsigned size = frags * i_blocksize(inode);
+ spin_lock(&inode->i_lock);
+ __inode_add_bytes(inode, size);
+ if (unlikely((u32)inode->i_blocks != inode->i_blocks)) {
+ __inode_sub_bytes(inode, size);
+ spin_unlock(&inode->i_lock);
+ return false;
+ }
+ spin_unlock(&inode->i_lock);
+ return true;
+}
+
static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
unsigned oldcount, unsigned newcount)
{
@@ -530,6 +540,9 @@ static u64 ufs_add_fragments(struct inode *inode, u64 fragment,
for (i = oldcount; i < newcount; i++)
if (ubh_isclr (UCPI_UBH(ucpi), ucpi->c_freeoff, fragno + i))
return 0;
+
+ if (!try_add_frags(inode, count))
+ return 0;
/*
* Block can be extended
*/
@@ -647,6 +660,7 @@ cg_found:
ubh_setbit (UCPI_UBH(ucpi), ucpi->c_freeoff, goal + i);
i = uspi->s_fpb - count;
+ inode_sub_bytes(inode, i << uspi->s_fshift);
fs32_add(sb, &ucg->cg_cs.cs_nffree, i);
uspi->cs_total.cs_nffree += i;
fs32_add(sb, &UFS_SB(sb)->fs_cs(cgno).cs_nffree, i);
@@ -657,6 +671,8 @@ cg_found:
result = ufs_bitmap_search (sb, ucpi, goal, allocsize);
if (result == INVBLOCK)
return 0;
+ if (!try_add_frags(inode, count))
+ return 0;
for (i = 0; i < count; i++)
ubh_clrbit (UCPI_UBH(ucpi), ucpi->c_freeoff, result + i);
@@ -716,6 +732,8 @@ norot:
return INVBLOCK;
ucpi->c_rotor = result;
gotit:
+ if (!try_add_frags(inode, uspi->s_fpb))
+ return 0;
blkno = ufs_fragstoblks(result);
ubh_clrblock (UCPI_UBH(ucpi), ucpi->c_freeoff, blkno);
if ((UFS_SB(sb)->s_flags & UFS_CG_MASK) == UFS_CG_44BSD)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.