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Diffstat (limited to 'fs/jffs2/dir.c')
-rw-r--r--fs/jffs2/dir.c100
1 files changed, 61 insertions, 39 deletions
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c
index f948f7e6ec82..c0c141f6fde1 100644
--- a/fs/jffs2/dir.c
+++ b/fs/jffs2/dir.c
@@ -86,7 +86,7 @@ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
dir_f = JFFS2_INODE_INFO(dir_i);
c = JFFS2_SB_INFO(dir_i->i_sb);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
/* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
@@ -99,7 +99,7 @@ static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
}
if (fd)
ino = fd->ino;
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
if (ino) {
inode = jffs2_iget(dir_i->i_sb, ino);
if (IS_ERR(inode)) {
@@ -146,7 +146,7 @@ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
}
curofs=1;
- down(&f->sem);
+ mutex_lock(&f->sem);
for (fd = f->dents; fd; fd = fd->next) {
curofs++;
@@ -166,7 +166,7 @@ static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
break;
offset++;
}
- up(&f->sem);
+ mutex_unlock(&f->sem);
out:
filp->f_pos = offset;
return 0;
@@ -208,6 +208,13 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
f = JFFS2_INODE_INFO(inode);
dir_f = JFFS2_INODE_INFO(dir_i);
+ /* jffs2_do_create() will want to lock it, _after_ reserving
+ space and taking c-alloc_sem. If we keep it locked here,
+ lockdep gets unhappy (although it's a false positive;
+ nothing else will be looking at this inode yet so there's
+ no chance of AB-BA deadlock involving its f->sem). */
+ mutex_unlock(&f->sem);
+
ret = jffs2_do_create(c, dir_f, f, ri,
dentry->d_name.name, dentry->d_name.len);
if (ret)
@@ -219,7 +226,8 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
d_instantiate(dentry, inode);
D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
- inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
+ inode->i_ino, inode->i_mode, inode->i_nlink,
+ f->inocache->pino_nlink, inode->i_mapping->nrpages));
return 0;
fail:
@@ -243,7 +251,7 @@ static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
dentry->d_name.len, dead_f, now);
if (dead_f->inocache)
- dentry->d_inode->i_nlink = dead_f->inocache->nlink;
+ dentry->d_inode->i_nlink = dead_f->inocache->pino_nlink;
if (!ret)
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
return ret;
@@ -275,9 +283,9 @@ static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct de
ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
if (!ret) {
- down(&f->sem);
- old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
- up(&f->sem);
+ mutex_lock(&f->sem);
+ old_dentry->d_inode->i_nlink = ++f->inocache->pino_nlink;
+ mutex_unlock(&f->sem);
d_instantiate(dentry, old_dentry->d_inode);
dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
atomic_inc(&old_dentry->d_inode->i_count);
@@ -351,7 +359,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
@@ -361,7 +369,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
f->target = kmalloc(targetlen + 1, GFP_KERNEL);
if (!f->target) {
printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return -ENOMEM;
@@ -374,7 +382,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
obsoleted by the first data write
*/
f->metadata = fn;
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
@@ -406,7 +414,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
}
dir_f = JFFS2_INODE_INFO(dir_i);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -429,7 +437,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
@@ -442,7 +450,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
@@ -493,11 +501,14 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
inode->i_op = &jffs2_dir_inode_operations;
inode->i_fop = &jffs2_dir_operations;
- /* Directories get nlink 2 at start */
- inode->i_nlink = 2;
f = JFFS2_INODE_INFO(inode);
+ /* Directories get nlink 2 at start */
+ inode->i_nlink = 2;
+ /* but ic->pino_nlink is the parent ino# */
+ f->inocache->pino_nlink = dir_i->i_ino;
+
ri->data_crc = cpu_to_je32(0);
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
@@ -507,7 +518,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
@@ -516,7 +527,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
obsoleted by the first data write
*/
f->metadata = fn;
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
@@ -548,7 +559,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
}
dir_f = JFFS2_INODE_INFO(dir_i);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -571,7 +582,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
@@ -585,7 +596,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
@@ -594,17 +605,25 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
{
+ struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
+ struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
struct jffs2_full_dirent *fd;
int ret;
+ uint32_t now = get_seconds();
for (fd = f->dents ; fd; fd = fd->next) {
if (fd->ino)
return -ENOTEMPTY;
}
- ret = jffs2_unlink(dir_i, dentry);
- if (!ret)
+
+ ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
+ dentry->d_name.len, f, now);
+ if (!ret) {
+ dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
+ clear_nlink(dentry->d_inode);
drop_nlink(dir_i);
+ }
return ret;
}
@@ -673,7 +692,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
if (IS_ERR(fn)) {
/* Eeek. Wave bye bye */
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
jffs2_clear_inode(inode);
return PTR_ERR(fn);
@@ -682,7 +701,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
obsoleted by the first data write
*/
f->metadata = fn;
- up(&f->sem);
+ mutex_unlock(&f->sem);
jffs2_complete_reservation(c);
@@ -714,7 +733,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
}
dir_f = JFFS2_INODE_INFO(dir_i);
- down(&dir_f->sem);
+ mutex_lock(&dir_f->sem);
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
@@ -740,7 +759,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
as if it were the final unlink() */
jffs2_complete_reservation(c);
jffs2_free_raw_dirent(rd);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_clear_inode(inode);
return PTR_ERR(fd);
}
@@ -753,7 +772,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de
one if necessary. */
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
- up(&dir_f->sem);
+ mutex_unlock(&dir_f->sem);
jffs2_complete_reservation(c);
d_instantiate(dentry, inode);
@@ -780,14 +799,14 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
if (S_ISDIR(new_dentry->d_inode->i_mode)) {
struct jffs2_full_dirent *fd;
- down(&victim_f->sem);
+ mutex_lock(&victim_f->sem);
for (fd = victim_f->dents; fd; fd = fd->next) {
if (fd->ino) {
- up(&victim_f->sem);
+ mutex_unlock(&victim_f->sem);
return -ENOTEMPTY;
}
}
- up(&victim_f->sem);
+ mutex_unlock(&victim_f->sem);
}
}
@@ -816,9 +835,12 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
/* Don't oops if the victim was a dirent pointing to an
inode which didn't exist. */
if (victim_f->inocache) {
- down(&victim_f->sem);
- victim_f->inocache->nlink--;
- up(&victim_f->sem);
+ mutex_lock(&victim_f->sem);
+ if (S_ISDIR(new_dentry->d_inode->i_mode))
+ victim_f->inocache->pino_nlink = 0;
+ else
+ victim_f->inocache->pino_nlink--;
+ mutex_unlock(&victim_f->sem);
}
}
@@ -836,11 +858,11 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
if (ret) {
/* Oh shit. We really ought to make a single node which can do both atomically */
struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
- down(&f->sem);
+ mutex_lock(&f->sem);
inc_nlink(old_dentry->d_inode);
- if (f->inocache)
- f->inocache->nlink++;
- up(&f->sem);
+ if (f->inocache && !S_ISDIR(old_dentry->d_inode->i_mode))
+ f->inocache->pino_nlink++;
+ mutex_unlock(&f->sem);
printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
/* Might as well let the VFS know */
generated by cgit v1.2.3 (git 2.0.4) at 2024-06-06 16:03:30 +0000