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Diffstat (limited to 'fs/hpfs/alloc.c')
-rw-r--r--fs/hpfs/alloc.c184
1 files changed, 107 insertions, 77 deletions
diff --git a/fs/hpfs/alloc.c b/fs/hpfs/alloc.c
index 5503e2c2891..f005046e159 100644
--- a/fs/hpfs/alloc.c
+++ b/fs/hpfs/alloc.c
@@ -8,7 +8,57 @@
#include "hpfs_fn.h"
-static int hpfs_alloc_if_possible_nolock(struct super_block *s, secno sec);
+static void hpfs_claim_alloc(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free != (unsigned)-1) {
+ if (unlikely(!sbi->sb_n_free)) {
+ hpfs_error(s, "free count underflow, allocating sector %08x", sec);
+ sbi->sb_n_free = -1;
+ return;
+ }
+ sbi->sb_n_free--;
+ }
+}
+
+static void hpfs_claim_free(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free != (unsigned)-1) {
+ if (unlikely(sbi->sb_n_free >= sbi->sb_fs_size)) {
+ hpfs_error(s, "free count overflow, freeing sector %08x", sec);
+ sbi->sb_n_free = -1;
+ return;
+ }
+ sbi->sb_n_free++;
+ }
+}
+
+static void hpfs_claim_dirband_alloc(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free_dnodes != (unsigned)-1) {
+ if (unlikely(!sbi->sb_n_free_dnodes)) {
+ hpfs_error(s, "dirband free count underflow, allocating sector %08x", sec);
+ sbi->sb_n_free_dnodes = -1;
+ return;
+ }
+ sbi->sb_n_free_dnodes--;
+ }
+}
+
+static void hpfs_claim_dirband_free(struct super_block *s, secno sec)
+{
+ struct hpfs_sb_info *sbi = hpfs_sb(s);
+ if (sbi->sb_n_free_dnodes != (unsigned)-1) {
+ if (unlikely(sbi->sb_n_free_dnodes >= sbi->sb_dirband_size / 4)) {
+ hpfs_error(s, "dirband free count overflow, freeing sector %08x", sec);
+ sbi->sb_n_free_dnodes = -1;
+ return;
+ }
+ sbi->sb_n_free_dnodes++;
+ }
+}
/*
* Check if a sector is allocated in bitmap
@@ -18,9 +68,9 @@ static int hpfs_alloc_if_possible_nolock(struct super_block *s, secno sec);
static int chk_if_allocated(struct super_block *s, secno sec, char *msg)
{
struct quad_buffer_head qbh;
- unsigned *bmp;
+ __le32 *bmp;
if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "chk"))) goto fail;
- if ((bmp[(sec & 0x3fff) >> 5] >> (sec & 0x1f)) & 1) {
+ if ((le32_to_cpu(bmp[(sec & 0x3fff) >> 5]) >> (sec & 0x1f)) & 1) {
hpfs_error(s, "sector '%s' - %08x not allocated in bitmap", msg, sec);
goto fail1;
}
@@ -28,7 +78,7 @@ static int chk_if_allocated(struct super_block *s, secno sec, char *msg)
if (sec >= hpfs_sb(s)->sb_dirband_start && sec < hpfs_sb(s)->sb_dirband_start + hpfs_sb(s)->sb_dirband_size) {
unsigned ssec = (sec - hpfs_sb(s)->sb_dirband_start) / 4;
if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) goto fail;
- if ((bmp[ssec >> 5] >> (ssec & 0x1f)) & 1) {
+ if ((le32_to_cpu(bmp[ssec >> 5]) >> (ssec & 0x1f)) & 1) {
hpfs_error(s, "sector '%s' - %08x not allocated in directory bitmap", msg, sec);
goto fail1;
}
@@ -64,7 +114,7 @@ int hpfs_chk_sectors(struct super_block *s, secno start, int len, char *msg)
static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigned forward)
{
struct quad_buffer_head qbh;
- unsigned *bmp;
+ __le32 *bmp;
unsigned bs = near & ~0x3fff;
unsigned nr = (near & 0x3fff) & ~(n - 1);
/*unsigned mnr;*/
@@ -75,7 +125,6 @@ static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigne
hpfs_error(s, "Bad allocation size: %d", n);
return 0;
}
- lock_super(s);
if (bs != ~0x3fff) {
if (!(bmp = hpfs_map_bitmap(s, near >> 14, &qbh, "aib"))) goto uls;
} else {
@@ -85,10 +134,6 @@ static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigne
ret = bs + nr;
goto rt;
}
- /*if (!tstbits(bmp, nr + n, n + forward)) {
- ret = bs + nr + n;
- goto rt;
- }*/
q = nr + n; b = 0;
while ((a = tstbits(bmp, q, n + forward)) != 0) {
q += a;
@@ -105,14 +150,14 @@ static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigne
goto rt;
}
nr >>= 5;
- /*for (i = nr + 1; i != nr; i++, i &= 0x1ff) {*/
+ /*for (i = nr + 1; i != nr; i++, i &= 0x1ff) */
i = nr;
do {
- if (!bmp[i]) goto cont;
- if (n + forward >= 0x3f && bmp[i] != -1) goto cont;
+ if (!le32_to_cpu(bmp[i])) goto cont;
+ if (n + forward >= 0x3f && le32_to_cpu(bmp[i]) != 0xffffffff) goto cont;
q = i<<5;
if (i > 0) {
- unsigned k = bmp[i-1];
+ unsigned k = le32_to_cpu(bmp[i-1]);
while (k & 0x80000000) {
q--; k <<= 1;
}
@@ -132,18 +177,17 @@ static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigne
} while (i != nr);
rt:
if (ret) {
- if (hpfs_sb(s)->sb_chk && ((ret >> 14) != (bs >> 14) || (bmp[(ret & 0x3fff) >> 5] | ~(((1 << n) - 1) << (ret & 0x1f))) != 0xffffffff)) {
+ if (hpfs_sb(s)->sb_chk && ((ret >> 14) != (bs >> 14) || (le32_to_cpu(bmp[(ret & 0x3fff) >> 5]) | ~(((1 << n) - 1) << (ret & 0x1f))) != 0xffffffff)) {
hpfs_error(s, "Allocation doesn't work! Wanted %d, allocated at %08x", n, ret);
ret = 0;
goto b;
}
- bmp[(ret & 0x3fff) >> 5] &= ~(((1 << n) - 1) << (ret & 0x1f));
+ bmp[(ret & 0x3fff) >> 5] &= cpu_to_le32(~(((1 << n) - 1) << (ret & 0x1f)));
hpfs_mark_4buffers_dirty(&qbh);
}
b:
hpfs_brelse4(&qbh);
uls:
- unlock_super(s);
return ret;
}
@@ -155,7 +199,7 @@ static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigne
* sectors
*/
-secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forward, int lock)
+secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forward)
{
secno sec;
int i;
@@ -167,7 +211,6 @@ secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forwa
forward = -forward;
f_p = 1;
}
- if (lock) hpfs_lock_creation(s);
n_bmps = (sbi->sb_fs_size + 0x4000 - 1) >> 14;
if (near && near < sbi->sb_fs_size) {
if ((sec = alloc_in_bmp(s, near, n, f_p ? forward : forward/4))) goto ret;
@@ -212,20 +255,25 @@ secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forwa
}
sec = 0;
ret:
+ if (sec) {
+ i = 0;
+ do
+ hpfs_claim_alloc(s, sec + i);
+ while (unlikely(++i < n));
+ }
if (sec && f_p) {
for (i = 0; i < forward; i++) {
- if (!hpfs_alloc_if_possible_nolock(s, sec + i + 1)) {
+ if (!hpfs_alloc_if_possible(s, sec + n + i)) {
hpfs_error(s, "Prealloc doesn't work! Wanted %d, allocated at %08x, can't allocate %d", forward, sec, i);
sec = 0;
break;
}
}
}
- if (lock) hpfs_unlock_creation(s);
return sec;
}
-static secno alloc_in_dirband(struct super_block *s, secno near, int lock)
+static secno alloc_in_dirband(struct super_block *s, secno near)
{
unsigned nr = near;
secno sec;
@@ -236,76 +284,61 @@ static secno alloc_in_dirband(struct super_block *s, secno near, int lock)
nr = sbi->sb_dirband_start + sbi->sb_dirband_size - 4;
nr -= sbi->sb_dirband_start;
nr >>= 2;
- if (lock) hpfs_lock_creation(s);
sec = alloc_in_bmp(s, (~0x3fff) | nr, 1, 0);
- if (lock) hpfs_unlock_creation(s);
if (!sec) return 0;
+ hpfs_claim_dirband_alloc(s, sec);
return ((sec & 0x3fff) << 2) + sbi->sb_dirband_start;
}
/* Alloc sector if it's free */
-static int hpfs_alloc_if_possible_nolock(struct super_block *s, secno sec)
+int hpfs_alloc_if_possible(struct super_block *s, secno sec)
{
struct quad_buffer_head qbh;
- unsigned *bmp;
- lock_super(s);
+ __le32 *bmp;
if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "aip"))) goto end;
- if (bmp[(sec & 0x3fff) >> 5] & (1 << (sec & 0x1f))) {
- bmp[(sec & 0x3fff) >> 5] &= ~(1 << (sec & 0x1f));
+ if (le32_to_cpu(bmp[(sec & 0x3fff) >> 5]) & (1 << (sec & 0x1f))) {
+ bmp[(sec & 0x3fff) >> 5] &= cpu_to_le32(~(1 << (sec & 0x1f)));
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
- unlock_super(s);
+ hpfs_claim_alloc(s, sec);
return 1;
}
hpfs_brelse4(&qbh);
end:
- unlock_super(s);
return 0;
}
-int hpfs_alloc_if_possible(struct super_block *s, secno sec)
-{
- int r;
- hpfs_lock_creation(s);
- r = hpfs_alloc_if_possible_nolock(s, sec);
- hpfs_unlock_creation(s);
- return r;
-}
-
/* Free sectors in bitmaps */
void hpfs_free_sectors(struct super_block *s, secno sec, unsigned n)
{
struct quad_buffer_head qbh;
- unsigned *bmp;
+ __le32 *bmp;
struct hpfs_sb_info *sbi = hpfs_sb(s);
- /*printk("2 - ");*/
+ /*pr_info("2 - ");*/
if (!n) return;
if (sec < 0x12) {
hpfs_error(s, "Trying to free reserved sector %08x", sec);
return;
}
- lock_super(s);
sbi->sb_max_fwd_alloc += n > 0xffff ? 0xffff : n;
if (sbi->sb_max_fwd_alloc > 0xffffff) sbi->sb_max_fwd_alloc = 0xffffff;
new_map:
if (!(bmp = hpfs_map_bitmap(s, sec >> 14, &qbh, "free"))) {
- unlock_super(s);
return;
}
new_tst:
- if ((bmp[(sec & 0x3fff) >> 5] >> (sec & 0x1f) & 1)) {
+ if ((le32_to_cpu(bmp[(sec & 0x3fff) >> 5]) >> (sec & 0x1f) & 1)) {
hpfs_error(s, "sector %08x not allocated", sec);
hpfs_brelse4(&qbh);
- unlock_super(s);
return;
}
- bmp[(sec & 0x3fff) >> 5] |= 1 << (sec & 0x1f);
+ bmp[(sec & 0x3fff) >> 5] |= cpu_to_le32(1 << (sec & 0x1f));
+ hpfs_claim_free(s, sec);
if (!--n) {
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
- unlock_super(s);
return;
}
if (!(++sec & 0x3fff)) {
@@ -327,13 +360,13 @@ int hpfs_check_free_dnodes(struct super_block *s, int n)
int n_bmps = (hpfs_sb(s)->sb_fs_size + 0x4000 - 1) >> 14;
int b = hpfs_sb(s)->sb_c_bitmap & 0x0fffffff;
int i, j;
- unsigned *bmp;
+ __le32 *bmp;
struct quad_buffer_head qbh;
if ((bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
for (j = 0; j < 512; j++) {
unsigned k;
- if (!bmp[j]) continue;
- for (k = bmp[j]; k; k >>= 1) if (k & 1) if (!--n) {
+ if (!le32_to_cpu(bmp[j])) continue;
+ for (k = le32_to_cpu(bmp[j]); k; k >>= 1) if (k & 1) if (!--n) {
hpfs_brelse4(&qbh);
return 0;
}
@@ -352,10 +385,10 @@ int hpfs_check_free_dnodes(struct super_block *s, int n)
chk_bmp:
if (bmp) {
for (j = 0; j < 512; j++) {
- unsigned k;
- if (!bmp[j]) continue;
+ u32 k;
+ if (!le32_to_cpu(bmp[j])) continue;
for (k = 0xf; k; k <<= 4)
- if ((bmp[j] & k) == k) {
+ if ((le32_to_cpu(bmp[j]) & k) == k) {
if (!--n) {
hpfs_brelse4(&qbh);
return 0;
@@ -379,44 +412,41 @@ void hpfs_free_dnode(struct super_block *s, dnode_secno dno)
hpfs_free_sectors(s, dno, 4);
} else {
struct quad_buffer_head qbh;
- unsigned *bmp;
+ __le32 *bmp;
unsigned ssec = (dno - hpfs_sb(s)->sb_dirband_start) / 4;
- lock_super(s);
if (!(bmp = hpfs_map_dnode_bitmap(s, &qbh))) {
- unlock_super(s);
return;
}
- bmp[ssec >> 5] |= 1 << (ssec & 0x1f);
+ bmp[ssec >> 5] |= cpu_to_le32(1 << (ssec & 0x1f));
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
- unlock_super(s);
+ hpfs_claim_dirband_free(s, dno);
}
}
struct dnode *hpfs_alloc_dnode(struct super_block *s, secno near,
- dnode_secno *dno, struct quad_buffer_head *qbh,
- int lock)
+ dnode_secno *dno, struct quad_buffer_head *qbh)
{
struct dnode *d;
- if (hpfs_count_one_bitmap(s, hpfs_sb(s)->sb_dmap) > FREE_DNODES_ADD) {
- if (!(*dno = alloc_in_dirband(s, near, lock)))
- if (!(*dno = hpfs_alloc_sector(s, near, 4, 0, lock))) return NULL;
+ if (hpfs_get_free_dnodes(s) > FREE_DNODES_ADD) {
+ if (!(*dno = alloc_in_dirband(s, near)))
+ if (!(*dno = hpfs_alloc_sector(s, near, 4, 0))) return NULL;
} else {
- if (!(*dno = hpfs_alloc_sector(s, near, 4, 0, lock)))
- if (!(*dno = alloc_in_dirband(s, near, lock))) return NULL;
+ if (!(*dno = hpfs_alloc_sector(s, near, 4, 0)))
+ if (!(*dno = alloc_in_dirband(s, near))) return NULL;
}
if (!(d = hpfs_get_4sectors(s, *dno, qbh))) {
hpfs_free_dnode(s, *dno);
return NULL;
}
memset(d, 0, 2048);
- d->magic = DNODE_MAGIC;
- d->first_free = 52;
+ d->magic = cpu_to_le32(DNODE_MAGIC);
+ d->first_free = cpu_to_le32(52);
d->dirent[0] = 32;
d->dirent[2] = 8;
d->dirent[30] = 1;
d->dirent[31] = 255;
- d->self = *dno;
+ d->self = cpu_to_le32(*dno);
return d;
}
@@ -424,16 +454,16 @@ struct fnode *hpfs_alloc_fnode(struct super_block *s, secno near, fnode_secno *f
struct buffer_head **bh)
{
struct fnode *f;
- if (!(*fno = hpfs_alloc_sector(s, near, 1, FNODE_ALLOC_FWD, 1))) return NULL;
+ if (!(*fno = hpfs_alloc_sector(s, near, 1, FNODE_ALLOC_FWD))) return NULL;
if (!(f = hpfs_get_sector(s, *fno, bh))) {
hpfs_free_sectors(s, *fno, 1);
return NULL;
}
memset(f, 0, 512);
- f->magic = FNODE_MAGIC;
- f->ea_offs = 0xc4;
+ f->magic = cpu_to_le32(FNODE_MAGIC);
+ f->ea_offs = cpu_to_le16(0xc4);
f->btree.n_free_nodes = 8;
- f->btree.first_free = 8;
+ f->btree.first_free = cpu_to_le16(8);
return f;
}
@@ -441,16 +471,16 @@ struct anode *hpfs_alloc_anode(struct super_block *s, secno near, anode_secno *a
struct buffer_head **bh)
{
struct anode *a;
- if (!(*ano = hpfs_alloc_sector(s, near, 1, ANODE_ALLOC_FWD, 1))) return NULL;
+ if (!(*ano = hpfs_alloc_sector(s, near, 1, ANODE_ALLOC_FWD))) return NULL;
if (!(a = hpfs_get_sector(s, *ano, bh))) {
hpfs_free_sectors(s, *ano, 1);
return NULL;
}
memset(a, 0, 512);
- a->magic = ANODE_MAGIC;
- a->self = *ano;
+ a->magic = cpu_to_le32(ANODE_MAGIC);
+ a->self = cpu_to_le32(*ano);
a->btree.n_free_nodes = 40;
a->btree.n_used_nodes = 0;
- a->btree.first_free = 8;
+ a->btree.first_free = cpu_to_le16(8);
return a;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-04 01:27:37 +0000