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HPFS: Remove remaining locks 

Remove remaining locks

Because of a new global per-fs lock, no other locks are needed

Signed-off-by: Mikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mikulas Patocka 2011-05-08 20:43:06 +02:00 committed by Linus Torvalds
parent 7dd29d8d86
commit 7d23ce36e3
9 changed files with 50 additions and 155 deletions
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50
fs/hpfs/alloc.c
View File

@ -8,8 +8,6 @@
#include "hpfs_fn.h"
static int hpfs_alloc_if_possible_nolock(struct super_block *s, secno sec);
/*
* Check if a sector is allocated in bitmap
* This is really slow. Turned on only if chk==2
@ -75,7 +73,6 @@ 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 {
@ -143,7 +140,6 @@ static secno alloc_in_bmp(struct super_block *s, secno near, unsigned n, unsigne
b:
hpfs_brelse4(&qbh);
uls:
unlock_super(s);
return ret;
}
@ -155,7 +151,7 @@ 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 +163,6 @@ 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;
@ -214,18 +209,17 @@ secno hpfs_alloc_sector(struct super_block *s, secno near, unsigned n, int forwa
ret:
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 + i + 1)) {
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;
@ -236,43 +230,29 @@ 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;
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);
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));
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
unlock_super(s);
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)
@ -286,26 +266,22 @@ void hpfs_free_sectors(struct super_block *s, secno sec, unsigned n)
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)) {
hpfs_error(s, "sector %08x not allocated", sec);
hpfs_brelse4(&qbh);
unlock_super(s);
return;
}
bmp[(sec & 0x3fff) >> 5] |= 1 << (sec & 0x1f);
if (!--n) {
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
unlock_super(s);
return;
}
if (!(++sec & 0x3fff)) {
@ -381,29 +357,25 @@ void hpfs_free_dnode(struct super_block *s, dnode_secno dno)
struct quad_buffer_head qbh;
unsigned *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);
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
unlock_super(s);
}
}
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 (!(*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);
@ -424,7 +396,7 @@ 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;
@ -441,7 +413,7 @@ 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;

2
fs/hpfs/anode.c
View File

@ -115,7 +115,7 @@ secno hpfs_add_sector_to_btree(struct super_block *s, secno node, int fnod, unsi
}
se = !fnod ? node : (node + 16384) & ~16383;
}
if (!(se = hpfs_alloc_sector(s, se, 1, fsecno*ALLOC_M>ALLOC_FWD_MAX ? ALLOC_FWD_MAX : fsecno*ALLOC_M<ALLOC_FWD_MIN ? ALLOC_FWD_MIN : fsecno*ALLOC_M, 1))) {
if (!(se = hpfs_alloc_sector(s, se, 1, fsecno*ALLOC_M>ALLOC_FWD_MAX ? ALLOC_FWD_MAX : fsecno*ALLOC_M<ALLOC_FWD_MIN ? ALLOC_FWD_MIN : fsecno*ALLOC_M))) {
brelse(bh);
return -1;
}

16
fs/hpfs/buffer.c
View File

@ -9,22 +9,6 @@
#include <linux/slab.h>
#include "hpfs_fn.h"
void hpfs_lock_creation(struct super_block *s)
{
#ifdef DEBUG_LOCKS
printk("lock creation\n");
#endif
mutex_lock(&hpfs_sb(s)->hpfs_creation_de);
}
void hpfs_unlock_creation(struct super_block *s)
{
#ifdef DEBUG_LOCKS
printk("unlock creation\n");
#endif
mutex_unlock(&hpfs_sb(s)->hpfs_creation_de);
}
/* Map a sector into a buffer and return pointers to it and to the buffer. */
void *hpfs_map_sector(struct super_block *s, unsigned secno, struct buffer_head **bhp,

57
fs/hpfs/dnode.c
View File

@ -145,9 +145,10 @@ static void set_last_pointer(struct super_block *s, struct dnode *d, dnode_secno
}
}
if (ptr) {
if ((d->first_free += 4) > 2048) {
hpfs_error(s,"set_last_pointer: too long dnode %08x", d->self);
d->first_free -= 4;
d->first_free = cpu_to_le32(le32_to_cpu(d->first_free) + 4);
if (le32_to_cpu(d->first_free) > 2048) {
hpfs_error(s, "set_last_pointer: too long dnode %08x", d->self);
d->first_free = cpu_to_le32(le32_to_cpu(d->first_free) - 4);
return;
}
de->length = 36;
@ -184,7 +185,7 @@ struct hpfs_dirent *hpfs_add_de(struct super_block *s, struct dnode *d,
de->not_8x3 = hpfs_is_name_long(name, namelen);
de->namelen = namelen;
memcpy(de->name, name, namelen);
d->first_free += d_size;
d->first_free = cpu_to_le32(le32_to_cpu(d->first_free) + d_size);
return de;
}
@ -197,8 +198,8 @@ static void hpfs_delete_de(struct super_block *s, struct dnode *d,
hpfs_error(s, "attempt to delete last dirent in dnode %08x", d->self);
return;
}
d->first_free -= de->length;
memmove(de, de_next_de(de), d->first_free + (char *)d - (char *)de);
d->first_free = cpu_to_le32(le32_to_cpu(d->first_free) - de->length);
memmove(de, de_next_de(de), le32_to_cpu(d->first_free) + (char *)d - (char *)de);
}
static void fix_up_ptrs(struct super_block *s, struct dnode *d)
@ -262,7 +263,7 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
kfree(nname);
return 1;
}
if (d->first_free + de_size(namelen, down_ptr) <= 2048) {
if (le32_to_cpu(d->first_free) + de_size(namelen, down_ptr) <= 2048) {
loff_t t;
copy_de(de=hpfs_add_de(i->i_sb, d, name, namelen, down_ptr), new_de);
t = get_pos(d, de);
@ -286,11 +287,11 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
kfree(nname);
return 1;
}
memcpy(nd, d, d->first_free);
memcpy(nd, d, le32_to_cpu(d->first_free));
copy_de(de = hpfs_add_de(i->i_sb, nd, name, namelen, down_ptr), new_de);
for_all_poss(i, hpfs_pos_ins, get_pos(nd, de), 1);
h = ((char *)dnode_last_de(nd) - (char *)nd) / 2 + 10;
if (!(ad = hpfs_alloc_dnode(i->i_sb, d->up, &adno, &qbh1, 0))) {
if (!(ad = hpfs_alloc_dnode(i->i_sb, d->up, &adno, &qbh1))) {
hpfs_error(i->i_sb, "unable to alloc dnode - dnode tree will be corrupted");
hpfs_brelse4(&qbh);
kfree(nd);
@ -313,9 +314,9 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
down_ptr = adno;
set_last_pointer(i->i_sb, ad, de->down ? de_down_pointer(de) : 0);
de = de_next_de(de);
memmove((char *)nd + 20, de, nd->first_free + (char *)nd - (char *)de);
nd->first_free -= (char *)de - (char *)nd - 20;
memcpy(d, nd, nd->first_free);
memmove((char *)nd + 20, de, le32_to_cpu(nd->first_free) + (char *)nd - (char *)de);
nd->first_free = cpu_to_le32(le32_to_cpu(nd->first_free) - (char *)de - (char *)nd - 20);
memcpy(d, nd, le32_to_cpu(nd->first_free));
for_all_poss(i, hpfs_pos_del, (loff_t)dno << 4, pos);
fix_up_ptrs(i->i_sb, ad);
if (!d->root_dnode) {
@ -326,7 +327,7 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
hpfs_brelse4(&qbh1);
goto go_up;
}
if (!(rd = hpfs_alloc_dnode(i->i_sb, d->up, &rdno, &qbh2, 0))) {
if (!(rd = hpfs_alloc_dnode(i->i_sb, d->up, &rdno, &qbh2))) {
hpfs_error(i->i_sb, "unable to alloc dnode - dnode tree will be corrupted");
hpfs_brelse4(&qbh);
hpfs_brelse4(&qbh1);
@ -373,7 +374,7 @@ static int hpfs_add_to_dnode(struct inode *i, dnode_secno dno,
int hpfs_add_dirent(struct inode *i,
const unsigned char *name, unsigned namelen,
struct hpfs_dirent *new_de, int cdepth)
struct hpfs_dirent *new_de)
{
struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
struct dnode *d;
@ -403,7 +404,6 @@ int hpfs_add_dirent(struct inode *i,
}
}
hpfs_brelse4(&qbh);
if (!cdepth) hpfs_lock_creation(i->i_sb);
if (hpfs_check_free_dnodes(i->i_sb, FREE_DNODES_ADD)) {
c = 1;
goto ret;
@ -411,7 +411,6 @@ int hpfs_add_dirent(struct inode *i,
i->i_version++;
c = hpfs_add_to_dnode(i, dno, name, namelen, new_de, 0);
ret:
if (!cdepth) hpfs_unlock_creation(i->i_sb);
return c;
}
@ -474,7 +473,7 @@ static secno move_to_top(struct inode *i, dnode_secno from, dnode_secno to)
hpfs_brelse4(&qbh);
return 0;
}
dnode->first_free -= 4;
dnode->first_free = cpu_to_le32(le32_to_cpu(dnode->first_free) - 4);
de->length -= 4;
de->down = 0;
hpfs_mark_4buffers_dirty(&qbh);
@ -517,8 +516,8 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
try_it_again:
if (hpfs_stop_cycles(i->i_sb, dno, &c1, &c2, "delete_empty_dnode")) return;
if (!(dnode = hpfs_map_dnode(i->i_sb, dno, &qbh))) return;
if (dnode->first_free > 56) goto end;
if (dnode->first_free == 52 || dnode->first_free == 56) {
if (le32_to_cpu(dnode->first_free) > 56) goto end;
if (le32_to_cpu(dnode->first_free) == 52 || le32_to_cpu(dnode->first_free) == 56) {
struct hpfs_dirent *de_end;
int root = dnode->root_dnode;
up = dnode->up;
@ -571,9 +570,9 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
if (!down) {
de->down = 0;
de->length -= 4;
dnode->first_free -= 4;
dnode->first_free = cpu_to_le32(le32_to_cpu(dnode->first_free) - 4);
memmove(de_next_de(de), (char *)de_next_de(de) + 4,
(char *)dnode + dnode->first_free - (char *)de_next_de(de));
(char *)dnode + le32_to_cpu(dnode->first_free) - (char *)de_next_de(de));
} else {
struct dnode *d1;
struct quad_buffer_head qbh1;
@ -585,7 +584,7 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
}
}
} else {
hpfs_error(i->i_sb, "delete_empty_dnode: dnode %08x, first_free == %03x", dno, dnode->first_free);
hpfs_error(i->i_sb, "delete_empty_dnode: dnode %08x, first_free == %03x", dno, le32_to_cpu(dnode->first_free));
goto end;
}
@ -635,7 +634,7 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
struct hpfs_dirent *del = dnode_last_de(d1);
dlp = del->down ? de_down_pointer(del) : 0;
if (!dlp && down) {
if (d1->first_free > 2044) {
if (le32_to_cpu(d1->first_free) > 2044) {
if (hpfs_sb(i->i_sb)->sb_chk >= 2) {
printk("HPFS: warning: unbalanced dnode tree, see hpfs.txt 4 more info\n");
printk("HPFS: warning: terminating balancing operation\n");
@ -649,12 +648,12 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
}
del->length += 4;
del->down = 1;
d1->first_free += 4;
d1->first_free = cpu_to_le32(le32_to_cpu(d1->first_free) + 4);
}
if (dlp && !down) {
del->length -= 4;
del->down = 0;
d1->first_free -= 4;
d1->first_free = cpu_to_le32(le32_to_cpu(d1->first_free) - 4);
} else if (down)
*(dnode_secno *) ((void *) del + del->length - 4) = down;
} else goto endm;
@ -670,7 +669,7 @@ static void delete_empty_dnode(struct inode *i, dnode_secno dno)
if (!de_prev->down) {
de_prev->length += 4;
de_prev->down = 1;
dnode->first_free += 4;
dnode->first_free = cpu_to_le32(le32_to_cpu(dnode->first_free) + 4);
}
*(dnode_secno *) ((void *) de_prev + de_prev->length - 4) = ndown;
hpfs_mark_4buffers_dirty(&qbh);
@ -701,7 +700,6 @@ int hpfs_remove_dirent(struct inode *i, dnode_secno dno, struct hpfs_dirent *de,
{
struct dnode *dnode = qbh->data;
dnode_secno down = 0;
int lock = 0;
loff_t t;
if (de->first || de->last) {
hpfs_error(i->i_sb, "hpfs_remove_dirent: attempt to delete first or last dirent in dnode %08x", dno);
@ -710,11 +708,8 @@ int hpfs_remove_dirent(struct inode *i, dnode_secno dno, struct hpfs_dirent *de,
}
if (de->down) down = de_down_pointer(de);
if (depth && (de->down || (de == dnode_first_de(dnode) && de_next_de(de)->last))) {
lock = 1;
hpfs_lock_creation(i->i_sb);
if (hpfs_check_free_dnodes(i->i_sb, FREE_DNODES_DEL)) {
hpfs_brelse4(qbh);
hpfs_unlock_creation(i->i_sb);
return 2;
}
}
@ -727,11 +722,9 @@ int hpfs_remove_dirent(struct inode *i, dnode_secno dno, struct hpfs_dirent *de,
dnode_secno a = move_to_top(i, down, dno);
for_all_poss(i, hpfs_pos_subst, 5, t);
if (a) delete_empty_dnode(i, a);
if (lock) hpfs_unlock_creation(i->i_sb);
return !a;
}
delete_empty_dnode(i, dno);
if (lock) hpfs_unlock_creation(i->i_sb);
return 0;
}

6
fs/hpfs/ea.c
View File

@ -266,7 +266,7 @@ void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key,
secno n;
struct buffer_head *bh;
char *data;
if (!(n = hpfs_alloc_sector(s, fno, 1, 0, 1))) return;
if (!(n = hpfs_alloc_sector(s, fno, 1, 0))) return;
if (!(data = hpfs_get_sector(s, n, &bh))) {
hpfs_free_sectors(s, n, 1);
return;
@ -284,7 +284,7 @@ void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key,
if (pos >= 30000) goto bail;
while (((pos + 511) >> 9) > len) {
if (!len) {
if (!(fnode->ea_secno = hpfs_alloc_sector(s, fno, 1, 0, 1)))
if (!(fnode->ea_secno = hpfs_alloc_sector(s, fno, 1, 0)))
goto bail;
fnode->ea_anode = 0;
len++;
@ -312,7 +312,7 @@ void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key,
fnode->ea_secno = a_s;*/
secno new_sec;
int i;
if (!(new_sec = hpfs_alloc_sector(s, fno, 1, 1 - ((pos + 511) >> 9), 1)))
if (!(new_sec = hpfs_alloc_sector(s, fno, 1, 1 - ((pos + 511) >> 9))))
goto bail;
for (i = 0; i < len; i++) {
struct buffer_head *bh1, *bh2;

12
fs/hpfs/hpfs_fn.h
View File

@ -56,8 +56,6 @@ struct hpfs_inode_info {
unsigned i_ea_uid : 1; /* file's uid is stored in ea */
unsigned i_ea_gid : 1; /* file's gid is stored in ea */
unsigned i_dirty : 1;
struct mutex i_mutex;
struct mutex i_parent_mutex;
loff_t **i_rddir_off;
struct inode vfs_inode;
};
@ -88,8 +86,6 @@ struct hpfs_sb_info {
unsigned *sb_bmp_dir; /* main bitmap directory */
unsigned sb_c_bitmap; /* current bitmap */
unsigned sb_max_fwd_alloc; /* max forwad allocation */
struct mutex hpfs_creation_de; /* when creating dirents, nobody else
can alloc blocks */
/*unsigned sb_mounting : 1;*/
int sb_timeshift;
};
@ -201,12 +197,12 @@ static inline unsigned tstbits(unsigned *bmp, unsigned b, unsigned n)
/* alloc.c */
int hpfs_chk_sectors(struct super_block *, secno, int, char *);
secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int, int);
secno hpfs_alloc_sector(struct super_block *, secno, unsigned, int);
int hpfs_alloc_if_possible(struct super_block *, secno);
void hpfs_free_sectors(struct super_block *, secno, unsigned);
int hpfs_check_free_dnodes(struct super_block *, int);
void hpfs_free_dnode(struct super_block *, secno);
struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *, int);
struct dnode *hpfs_alloc_dnode(struct super_block *, secno, dnode_secno *, struct quad_buffer_head *);
struct fnode *hpfs_alloc_fnode(struct super_block *, secno, fnode_secno *, struct buffer_head **);
struct anode *hpfs_alloc_anode(struct super_block *, secno, anode_secno *, struct buffer_head **);
@ -223,8 +219,6 @@ void hpfs_remove_fnode(struct super_block *, fnode_secno fno);
/* buffer.c */
void hpfs_lock_creation(struct super_block *);
void hpfs_unlock_creation(struct super_block *);
void *hpfs_map_sector(struct super_block *, unsigned, struct buffer_head **, int);
void *hpfs_get_sector(struct super_block *, unsigned, struct buffer_head **);
void *hpfs_map_4sectors(struct super_block *, unsigned, struct quad_buffer_head *, int);
@ -248,7 +242,7 @@ void hpfs_del_pos(struct inode *, loff_t *);
struct hpfs_dirent *hpfs_add_de(struct super_block *, struct dnode *,
const unsigned char *, unsigned, secno);
int hpfs_add_dirent(struct inode *, const unsigned char *, unsigned,
struct hpfs_dirent *, int);
struct hpfs_dirent *);
int hpfs_remove_dirent(struct inode *, dnode_secno, struct hpfs_dirent *, struct quad_buffer_head *, int);
void hpfs_count_dnodes(struct super_block *, dnode_secno, int *, int *, int *);
dnode_secno hpfs_de_as_down_as_possible(struct super_block *, dnode_secno dno);

5
fs/hpfs/inode.c
View File

@ -187,9 +187,7 @@ void hpfs_write_inode(struct inode *i)
kfree(hpfs_inode->i_rddir_off);
hpfs_inode->i_rddir_off = NULL;
}
mutex_lock(&hpfs_inode->i_parent_mutex);
if (!i->i_nlink) {
mutex_unlock(&hpfs_inode->i_parent_mutex);
return;
}
parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir);
@ -200,14 +198,11 @@ void hpfs_write_inode(struct inode *i)
hpfs_read_inode(parent);
unlock_new_inode(parent);
}
mutex_lock(&hpfs_inode->i_mutex);
hpfs_write_inode_nolock(i);
mutex_unlock(&hpfs_inode->i_mutex);
iput(parent);
} else {
mark_inode_dirty(i);
}
mutex_unlock(&hpfs_inode->i_parent_mutex);
}
void hpfs_write_inode_nolock(struct inode *i)

53
fs/hpfs/namei.c
View File

@ -29,7 +29,7 @@ static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
fnode = hpfs_alloc_fnode(dir->i_sb, hpfs_i(dir)->i_dno, &fno, &bh);
if (!fnode)
goto bail;
dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0, 1);
dnode = hpfs_alloc_dnode(dir->i_sb, fno, &dno, &qbh0);
if (!dnode)
goto bail1;
memset(&dee, 0, sizeof dee);
@ -60,8 +60,7 @@ static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
if (dee.read_only)
result->i_mode &= ~0222;
mutex_lock(&hpfs_i(dir)->i_mutex);
r = hpfs_add_dirent(dir, name, len, &dee, 0);
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail3;
if (r == -1) {
@ -101,11 +100,9 @@ static int hpfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
hpfs_write_inode_nolock(result);
}
d_instantiate(dentry, result);
mutex_unlock(&hpfs_i(dir)->i_mutex);
hpfs_unlock(dir->i_sb);
return 0;
bail3:
mutex_unlock(&hpfs_i(dir)->i_mutex);
iput(result);
bail2:
hpfs_brelse4(&qbh0);
@ -168,8 +165,7 @@ static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struc
result->i_data.a_ops = &hpfs_aops;
hpfs_i(result)->mmu_private = 0;
mutex_lock(&hpfs_i(dir)->i_mutex);
r = hpfs_add_dirent(dir, name, len, &dee, 0);
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
@ -193,12 +189,10 @@ static int hpfs_create(struct inode *dir, struct dentry *dentry, int mode, struc
hpfs_write_inode_nolock(result);
}
d_instantiate(dentry, result);
mutex_unlock(&hpfs_i(dir)->i_mutex);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
mutex_unlock(&hpfs_i(dir)->i_mutex);
iput(result);
bail1:
brelse(bh);
@ -254,8 +248,7 @@ static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t
result->i_blocks = 1;
init_special_inode(result, mode, rdev);
mutex_lock(&hpfs_i(dir)->i_mutex);
r = hpfs_add_dirent(dir, name, len, &dee, 0);
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
@ -271,12 +264,10 @@ static int hpfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t
hpfs_write_inode_nolock(result);
d_instantiate(dentry, result);
mutex_unlock(&hpfs_i(dir)->i_mutex);
brelse(bh);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
mutex_unlock(&hpfs_i(dir)->i_mutex);
iput(result);
bail1:
brelse(bh);
@ -333,8 +324,7 @@ static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *sy
result->i_op = &page_symlink_inode_operations;
result->i_data.a_ops = &hpfs_symlink_aops;
mutex_lock(&hpfs_i(dir)->i_mutex);
r = hpfs_add_dirent(dir, name, len, &dee, 0);
r = hpfs_add_dirent(dir, name, len, &dee);
if (r == 1)
goto bail2;
if (r == -1) {
@ -352,11 +342,9 @@ static int hpfs_symlink(struct inode *dir, struct dentry *dentry, const char *sy
hpfs_write_inode_nolock(result);
d_instantiate(dentry, result);
mutex_unlock(&hpfs_i(dir)->i_mutex);
hpfs_unlock(dir->i_sb);
return 0;
bail2:
mutex_unlock(&hpfs_i(dir)->i_mutex);
iput(result);
bail1:
brelse(bh);
@ -382,8 +370,6 @@ static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
hpfs_lock(dir->i_sb);
hpfs_adjust_length(name, &len);
again:
mutex_lock(&hpfs_i(inode)->i_parent_mutex);
mutex_lock(&hpfs_i(dir)->i_mutex);
err = -ENOENT;
de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
if (!de)
@ -410,8 +396,6 @@ again:
if (rep++)
break;
mutex_unlock(&hpfs_i(dir)->i_mutex);
mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
dentry_unhash(dentry);
if (!d_unhashed(dentry)) {
dput(dentry);
@ -445,8 +429,6 @@ again:
out1:
hpfs_brelse4(&qbh);
out:
mutex_unlock(&hpfs_i(dir)->i_mutex);
mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
hpfs_unlock(dir->i_sb);
return err;
}
@ -466,8 +448,6 @@ static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
hpfs_adjust_length(name, &len);
hpfs_lock(dir->i_sb);
mutex_lock(&hpfs_i(inode)->i_parent_mutex);
mutex_lock(&hpfs_i(dir)->i_mutex);
err = -ENOENT;
de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
if (!de)
@ -505,8 +485,6 @@ static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
out1:
hpfs_brelse4(&qbh);
out:
mutex_unlock(&hpfs_i(dir)->i_mutex);
mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
hpfs_unlock(dir->i_sb);
return err;
}
@ -568,12 +546,6 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
hpfs_lock(i->i_sb);
/* order doesn't matter, due to VFS exclusion */
mutex_lock(&hpfs_i(i)->i_parent_mutex);
if (new_inode)
mutex_lock(&hpfs_i(new_inode)->i_parent_mutex);
mutex_lock(&hpfs_i(old_dir)->i_mutex);
if (new_dir != old_dir)
mutex_lock(&hpfs_i(new_dir)->i_mutex);
/* Erm? Moving over the empty non-busy directory is perfectly legal */
if (new_inode && S_ISDIR(new_inode->i_mode)) {
@ -610,9 +582,7 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_dir == old_dir) hpfs_brelse4(&qbh);
hpfs_lock_creation(i->i_sb);
if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de, 1))) {
hpfs_unlock_creation(i->i_sb);
if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
err = r == 1 ? -ENOSPC : -EFSERROR;
if (new_dir != old_dir) hpfs_brelse4(&qbh);
@ -621,20 +591,17 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_dir == old_dir)
if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
hpfs_unlock_creation(i->i_sb);
hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
err = -ENOENT;
goto end1;
}
if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
hpfs_unlock_creation(i->i_sb);
hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
err = r == 2 ? -ENOSPC : -EFSERROR;
goto end1;
}
hpfs_unlock_creation(i->i_sb);
end:
hpfs_i(i)->i_parent_dir = new_dir->i_ino;
if (S_ISDIR(i->i_mode)) {
@ -652,12 +619,6 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
hpfs_i(i)->i_conv = hpfs_sb(i->i_sb)->sb_conv;
hpfs_decide_conv(i, new_name, new_len);
end1:
if (old_dir != new_dir)
mutex_unlock(&hpfs_i(new_dir)->i_mutex);
mutex_unlock(&hpfs_i(old_dir)->i_mutex);
mutex_unlock(&hpfs_i(i)->i_parent_mutex);
if (new_inode)
mutex_unlock(&hpfs_i(new_inode)->i_parent_mutex);
hpfs_unlock(i->i_sb);
return err;
}

4
fs/hpfs/super.c
View File

@ -191,8 +191,6 @@ static void init_once(void *foo)
{
struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
mutex_init(&ei->i_mutex);
mutex_init(&ei->i_parent_mutex);
inode_init_once(&ei->vfs_inode);
}
@ -496,8 +494,6 @@ static int hpfs_fill_super(struct super_block *s, void *options, int silent)
mutex_init(&sbi->hpfs_mutex);
hpfs_lock(s);
mutex_init(&sbi->hpfs_creation_de);
uid = current_uid();
gid = current_gid();
umask = current_umask();