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[PATCH] r/o bind mounts: unlink: monitor i_nlink

Browse source 
When a filesystem decrements i_nlink to zero, it means that a write must be
performed in order to drop the inode from the filesystem.

We're shortly going to have keep filesystems from being remounted r/o between
the time that this i_nlink decrement and that write occurs.

So, add a little helper function to do the decrements.  We'll tie into it in a
bit to note when i_nlink hits zero.

Signed-off-by: Dave Hansen <haveblue@us.ibm.com>
Acked-by: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Hansen 2006-09-30 23:29:03 -07:00 committed by Linus Torvalds
parent aab520e2f6
commit 9a53c3a783
28 changed files with 83 additions and 93 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
drivers/usb/core/inode.c
View file

@ -332,7 +332,7 @@ static int usbfs_unlink (struct inode *dir, struct dentry *dentry)
{
struct inode *inode = dentry->d_inode;
mutex_lock(&inode->i_mutex);
dentry->d_inode->i_nlink--;
drop_nlink(dentry->d_inode);
dput(dentry);
mutex_unlock(&inode->i_mutex);
d_delete(dentry);
@ -347,10 +347,11 @@ static int usbfs_rmdir(struct inode *dir, struct dentry *dentry)
mutex_lock(&inode->i_mutex);
dentry_unhash(dentry);
if (usbfs_empty(dentry)) {
dentry->d_inode->i_nlink -= 2;
drop_nlink(dentry->d_inode);
drop_nlink(dentry->d_inode);
dput(dentry);
inode->i_flags |= S_DEAD;
dir->i_nlink--;
drop_nlink(dir);
error = 0;
}
mutex_unlock(&inode->i_mutex);

2
fs/autofs/root.c
View file

@ -414,7 +414,7 @@ static int autofs_root_rmdir(struct inode *dir, struct dentry *dentry)
dentry->d_time = (unsigned long)(struct autofs_dir_ent *)NULL;
autofs_hash_delete(ent);
dir->i_nlink--;
drop_nlink(dir);
d_drop(dentry);
unlock_kernel();

2
fs/autofs4/root.c
View file

@ -676,7 +676,7 @@ static int autofs4_dir_rmdir(struct inode *dir, struct dentry *dentry)
dentry->d_inode->i_nlink = 0;
if (dir->i_nlink)
dir->i_nlink--;
drop_nlink(dir);
return 0;
}

9
fs/bfs/dir.c
View file

@ -117,8 +117,7 @@ static int bfs_create(struct inode * dir, struct dentry * dentry, int mode,
err = bfs_add_entry(dir, dentry->d_name.name, dentry->d_name.len, inode->i_ino);
if (err) {
inode->i_nlink--;
mark_inode_dirty(inode);
inode_dec_link_count(inode);
iput(inode);
unlock_kernel();
return err;
@ -196,9 +195,8 @@ static int bfs_unlink(struct inode * dir, struct dentry * dentry)
mark_buffer_dirty(bh);
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
mark_inode_dirty(inode);
inode_dec_link_count(inode);
error = 0;
out_brelse:
@ -249,9 +247,8 @@ static int bfs_rename(struct inode * old_dir, struct dentry * old_dentry,
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(old_dir);
if (new_inode) {
new_inode->i_nlink--;
new_inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(new_inode);
inode_dec_link_count(new_inode);
}
mark_buffer_dirty(old_bh);
error = 0;

10
fs/cifs/inode.c
View file

@ -590,7 +590,7 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
if (!rc) {
if (direntry->d_inode)
direntry->d_inode->i_nlink--;
drop_nlink(direntry->d_inode);
} else if (rc == -ENOENT) {
d_drop(direntry);
} else if (rc == -ETXTBSY) {
@ -609,7 +609,7 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
CIFS_MOUNT_MAP_SPECIAL_CHR);
CIFSSMBClose(xid, pTcon, netfid);
if (direntry->d_inode)
direntry->d_inode->i_nlink--;
drop_nlink(direntry->d_inode);
}
} else if (rc == -EACCES) {
/* try only if r/o attribute set in local lookup data? */
@ -663,7 +663,7 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (!rc) {
if (direntry->d_inode)
direntry->d_inode->i_nlink--;
drop_nlink(direntry->d_inode);
} else if (rc == -ETXTBSY) {
int oplock = FALSE;
__u16 netfid;
@ -684,7 +684,7 @@ int cifs_unlink(struct inode *inode, struct dentry *direntry)
CIFS_MOUNT_MAP_SPECIAL_CHR);
CIFSSMBClose(xid, pTcon, netfid);
if (direntry->d_inode)
direntry->d_inode->i_nlink--;
drop_nlink(direntry->d_inode);
}
/* BB if rc = -ETXTBUSY goto the rename logic BB */
}
@ -816,7 +816,7 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry)
cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
if (!rc) {
inode->i_nlink--;
drop_nlink(inode);
i_size_write(direntry->d_inode,0);
direntry->d_inode->i_nlink = 0;
}

4
fs/coda/dir.c
View file

@ -367,7 +367,7 @@ int coda_unlink(struct inode *dir, struct dentry *de)
}
coda_dir_changed(dir, 0);
de->d_inode->i_nlink--;
drop_nlink(de->d_inode);
unlock_kernel();
return 0;
@ -394,7 +394,7 @@ int coda_rmdir(struct inode *dir, struct dentry *de)
}
coda_dir_changed(dir, -1);
de->d_inode->i_nlink--;
drop_nlink(de->d_inode);
d_delete(de);
unlock_kernel();

2
fs/ext2/namei.c
View file

@ -326,7 +326,7 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
ext2_set_link(new_dir, new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
new_inode->i_nlink--;
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
if (dir_de) {

14
fs/ext3/namei.c
View file

@ -1621,7 +1621,7 @@ static inline void ext3_inc_count(handle_t *handle, struct inode *inode)
static inline void ext3_dec_count(handle_t *handle, struct inode *inode)
{
inode->i_nlink--;
drop_nlink(inode);
}
static int ext3_add_nondir(handle_t *handle,
@ -1743,7 +1743,7 @@ retry:
inode->i_size = EXT3_I(inode)->i_disksize = inode->i_sb->s_blocksize;
dir_block = ext3_bread (handle, inode, 0, 1, &err);
if (!dir_block) {
inode->i_nlink--; /* is this nlink == 0? */
drop_nlink(inode); /* is this nlink == 0? */
ext3_mark_inode_dirty(handle, inode);
iput (inode);
goto out_stop;
@ -2053,7 +2053,7 @@ static int ext3_rmdir (struct inode * dir, struct dentry *dentry)
ext3_orphan_add(handle, inode);
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
ext3_mark_inode_dirty(handle, inode);
dir->i_nlink--;
drop_nlink(dir);
ext3_update_dx_flag(dir);
ext3_mark_inode_dirty(handle, dir);
@ -2104,7 +2104,7 @@ static int ext3_unlink(struct inode * dir, struct dentry *dentry)
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
ext3_update_dx_flag(dir);
ext3_mark_inode_dirty(handle, dir);
inode->i_nlink--;
drop_nlink(inode);
if (!inode->i_nlink)
ext3_orphan_add(handle, inode);
inode->i_ctime = dir->i_ctime;
@ -2326,7 +2326,7 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
}
if (new_inode) {
new_inode->i_nlink--;
drop_nlink(new_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
}
old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME_SEC;
@ -2337,9 +2337,9 @@ static int ext3_rename (struct inode * old_dir, struct dentry *old_dentry,
PARENT_INO(dir_bh->b_data) = cpu_to_le32(new_dir->i_ino);
BUFFER_TRACE(dir_bh, "call ext3_journal_dirty_metadata");
ext3_journal_dirty_metadata(handle, dir_bh);
old_dir->i_nlink--;
drop_nlink(old_dir);
if (new_inode) {
new_inode->i_nlink--;
drop_nlink(new_inode);
} else {
new_dir->i_nlink++;
ext3_update_dx_flag(new_dir);

2
fs/hfs/dir.c
View file

@ -246,7 +246,7 @@ static int hfs_unlink(struct inode *dir, struct dentry *dentry)
if (res)
return res;
inode->i_nlink--;
drop_nlink(inode);
hfs_delete_inode(inode);
inode->i_ctime = CURRENT_TIME_SEC;
mark_inode_dirty(inode);

2
fs/hfsplus/dir.c
View file

@ -338,7 +338,7 @@ static int hfsplus_unlink(struct inode *dir, struct dentry *dentry)
return res;
if (inode->i_nlink > 0)
inode->i_nlink--;
drop_nlink(inode);
hfsplus_delete_inode(inode);
if (inode->i_ino != cnid && !inode->i_nlink) {
if (!atomic_read(&HFSPLUS_I(inode).opencnt)) {

6
fs/hpfs/namei.c
View file

@ -434,7 +434,7 @@ again:
unlock_kernel();
return -ENOSPC;
default:
inode->i_nlink--;
drop_nlink(inode);
err = 0;
}
goto out;
@ -494,7 +494,7 @@ static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
err = -ENOSPC;
break;
default:
dir->i_nlink--;
drop_nlink(dir);
inode->i_nlink = 0;
err = 0;
}
@ -636,7 +636,7 @@ static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
hpfs_i(i)->i_parent_dir = new_dir->i_ino;
if (S_ISDIR(i->i_mode)) {
new_dir->i_nlink++;
old_dir->i_nlink--;
drop_nlink(old_dir);
}
if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
fnode->up = new_dir->i_ino;

3
fs/jffs/inode-v23.c
View file

@ -1052,9 +1052,8 @@ jffs_remove(struct inode *dir, struct dentry *dentry, int type)
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
mark_inode_dirty(inode);
inode_dec_link_count(inode);
d_delete(dentry); /* This also frees the inode */

6
fs/jffs2/dir.c
View file

@ -615,7 +615,7 @@ static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
}
ret = jffs2_unlink(dir_i, dentry);
if (!ret)
dir_i->i_nlink--;
drop_nlink(dir_i);
return ret;
}
@ -823,7 +823,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
if (victim_f) {
/* There was a victim. Kill it off nicely */
new_dentry->d_inode->i_nlink--;
drop_nlink(new_dentry->d_inode);
/* Don't oops if the victim was a dirent pointing to an
inode which didn't exist. */
if (victim_f->inocache) {
@ -862,7 +862,7 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
}
if (S_ISDIR(old_dentry->d_inode->i_mode))
old_dir_i->i_nlink--;
drop_nlink(old_dir_i);
new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);

14
fs/jfs/namei.c
View file

@ -393,9 +393,8 @@ static int jfs_rmdir(struct inode *dip, struct dentry *dentry)
/* update parent directory's link count corresponding
* to ".." entry of the target directory deleted
*/
dip->i_nlink--;
dip->i_ctime = dip->i_mtime = CURRENT_TIME;
mark_inode_dirty(dip);
inode_dec_link_count(dip);
/*
* OS/2 could have created EA and/or ACL
@ -515,8 +514,7 @@ static int jfs_unlink(struct inode *dip, struct dentry *dentry)
mark_inode_dirty(dip);
/* update target's inode */
ip->i_nlink--;
mark_inode_dirty(ip);
inode_dec_link_count(ip);
/*
* commit zero link count object
@ -835,7 +833,7 @@ static int jfs_link(struct dentry *old_dentry,
rc = txCommit(tid, 2, &iplist[0], 0);
if (rc) {
ip->i_nlink--;
ip->i_nlink--; /* never instantiated */
iput(ip);
} else
d_instantiate(dentry, ip);
@ -1155,9 +1153,9 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
old_ip->i_ino, JFS_RENAME);
if (rc)
goto out4;
new_ip->i_nlink--;
drop_nlink(new_ip);
if (S_ISDIR(new_ip->i_mode)) {
new_ip->i_nlink--;
drop_nlink(new_ip);
if (new_ip->i_nlink) {
mutex_unlock(&JFS_IP(new_ip)->commit_mutex);
if (old_dir != new_dir)
@ -1223,7 +1221,7 @@ static int jfs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out4;
}
if (S_ISDIR(old_ip->i_mode)) {
old_dir->i_nlink--;
drop_nlink(old_dir);
if (old_dir != new_dir) {
/*
* Change inode number of parent for moved directory

10
fs/libfs.c
View file

@ -275,7 +275,7 @@ int simple_unlink(struct inode *dir, struct dentry *dentry)
struct inode *inode = dentry->d_inode;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
inode->i_nlink--;
drop_nlink(inode);
dput(dentry);
return 0;
}
@ -285,9 +285,9 @@ int simple_rmdir(struct inode *dir, struct dentry *dentry)
if (!simple_empty(dentry))
return -ENOTEMPTY;
dentry->d_inode->i_nlink--;
drop_nlink(dentry->d_inode);
simple_unlink(dir, dentry);
dir->i_nlink--;
drop_nlink(dir);
return 0;
}
@ -303,9 +303,9 @@ int simple_rename(struct inode *old_dir, struct dentry *old_dentry,
if (new_dentry->d_inode) {
simple_unlink(new_dir, new_dentry);
if (they_are_dirs)
old_dir->i_nlink--;
drop_nlink(old_dir);
} else if (they_are_dirs) {
old_dir->i_nlink--;
drop_nlink(old_dir);
new_dir->i_nlink++;
}

2
fs/minix/namei.c
View file

@ -249,7 +249,7 @@ static int minix_rename(struct inode * old_dir, struct dentry *old_dentry,
minix_set_link(new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
new_inode->i_nlink--;
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
if (dir_de) {

9
fs/msdos/namei.c
View file

@ -343,7 +343,7 @@ static int msdos_rmdir(struct inode *dir, struct dentry *dentry)
err = fat_remove_entries(dir, &sinfo); /* and releases bh */
if (err)
goto out;
dir->i_nlink--;
drop_nlink(dir);
inode->i_nlink = 0;
inode->i_ctime = CURRENT_TIME_SEC;
@ -549,7 +549,7 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
if (err)
goto error_dotdot;
}
old_dir->i_nlink--;
drop_nlink(old_dir);
if (!new_inode)
new_dir->i_nlink++;
}
@ -566,10 +566,9 @@ static int do_msdos_rename(struct inode *old_dir, unsigned char *old_name,
mark_inode_dirty(old_dir);
if (new_inode) {
drop_nlink(new_inode);
if (is_dir)
new_inode->i_nlink -= 2;
else
new_inode->i_nlink--;
drop_nlink(new_inode);
new_inode->i_ctime = ts;
}
out:

6
fs/nfs/dir.c
View file

@ -843,7 +843,7 @@ static void nfs_dentry_iput(struct dentry *dentry, struct inode *inode)
nfs_inode_return_delegation(inode);
if (dentry->d_flags & DCACHE_NFSFS_RENAMED) {
lock_kernel();
inode->i_nlink--;
drop_nlink(inode);
nfs_complete_unlink(dentry);
unlock_kernel();
}
@ -1401,7 +1401,7 @@ static int nfs_safe_remove(struct dentry *dentry)
error = NFS_PROTO(dir)->remove(dir, &dentry->d_name);
/* The VFS may want to delete this inode */
if (error == 0)
inode->i_nlink--;
drop_nlink(inode);
nfs_mark_for_revalidate(inode);
nfs_end_data_update(inode);
} else
@ -1639,7 +1639,7 @@ static int nfs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out;
}
} else
new_inode->i_nlink--;
drop_nlink(new_inode);
go_ahead:
/*

4
fs/ocfs2/namei.c
View file

@ -739,7 +739,7 @@ static int ocfs2_link(struct dentry *old_dentry,
err = ocfs2_journal_dirty(handle, fe_bh);
if (err < 0) {
le16_add_cpu(&fe->i_links_count, -1);
inode->i_nlink--;
drop_nlink(inode);
mlog_errno(err);
goto bail;
}
@ -749,7 +749,7 @@ static int ocfs2_link(struct dentry *old_dentry,
parent_fe_bh, de_bh);
if (err) {
le16_add_cpu(&fe->i_links_count, -1);
inode->i_nlink--;
drop_nlink(inode);
mlog_errno(err);
goto bail;
}

6
fs/qnx4/namei.c
View file

@ -189,8 +189,7 @@ int qnx4_rmdir(struct inode *dir, struct dentry *dentry)
inode->i_nlink = 0;
mark_inode_dirty(inode);
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
dir->i_nlink--;
mark_inode_dirty(dir);
inode_dec_link_count(dir);
retval = 0;
end_rmdir:
@ -234,9 +233,8 @@ int qnx4_unlink(struct inode *dir, struct dentry *dentry)
mark_buffer_dirty(bh);
dir->i_ctime = dir->i_mtime = CURRENT_TIME_SEC;
mark_inode_dirty(dir);
inode->i_nlink--;
inode->i_ctime = dir->i_ctime;
mark_inode_dirty(inode);
inode_dec_link_count(inode);
retval = 0;
end_unlink:

6
fs/reiserfs/namei.c
View file

@ -20,7 +20,7 @@
#include <linux/quotaops.h>
#define INC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) { i->i_nlink++; if (i->i_nlink >= REISERFS_LINK_MAX) i->i_nlink=1; }
#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) i->i_nlink--;
#define DEC_DIR_INODE_NLINK(i) if (i->i_nlink != 1) drop_nlink(i);
// directory item contains array of entry headers. This performs
// binary search through that array
@ -994,7 +994,7 @@ static int reiserfs_unlink(struct inode *dir, struct dentry *dentry)
inode->i_nlink = 1;
}
inode->i_nlink--;
drop_nlink(inode);
/*
* we schedule before doing the add_save_link call, save the link
@ -1475,7 +1475,7 @@ static int reiserfs_rename(struct inode *old_dir, struct dentry *old_dentry,
if (S_ISDIR(new_dentry_inode->i_mode)) {
new_dentry_inode->i_nlink = 0;
} else {
new_dentry_inode->i_nlink--;
drop_nlink(new_dentry_inode);
}
new_dentry_inode->i_ctime = ctime;
savelink = new_dentry_inode->i_nlink;

2
fs/sysv/namei.c
View file

@ -250,7 +250,7 @@ static int sysv_rename(struct inode * old_dir, struct dentry * old_dentry,
sysv_set_link(new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
new_inode->i_nlink--;
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
if (dir_de) {

18
fs/udf/namei.c
View file

@ -878,8 +878,7 @@ static int udf_rmdir(struct inode * dir, struct dentry * dentry)
inode->i_nlink);
inode->i_nlink = 0;
inode->i_size = 0;
mark_inode_dirty(inode);
dir->i_nlink --;
inode_dec_link_count(inode);
inode->i_ctime = dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
mark_inode_dirty(dir);
@ -923,8 +922,7 @@ static int udf_unlink(struct inode * dir, struct dentry * dentry)
goto end_unlink;
dir->i_ctime = dir->i_mtime = current_fs_time(dir->i_sb);
mark_inode_dirty(dir);
inode->i_nlink--;
mark_inode_dirty(inode);
inode_dec_link_count(inode);
inode->i_ctime = dir->i_ctime;
retval = 0;
@ -1101,8 +1099,7 @@ out:
return err;
out_no_entry:
inode->i_nlink--;
mark_inode_dirty(inode);
inode_dec_link_count(inode);
iput(inode);
goto out;
}
@ -1261,9 +1258,8 @@ static int udf_rename (struct inode * old_dir, struct dentry * old_dentry,
if (new_inode)
{
new_inode->i_nlink--;
new_inode->i_ctime = current_fs_time(new_inode->i_sb);
mark_inode_dirty(new_inode);
inode_dec_link_count(new_inode);
}
old_dir->i_ctime = old_dir->i_mtime = current_fs_time(old_dir->i_sb);
mark_inode_dirty(old_dir);
@ -1279,12 +1275,10 @@ static int udf_rename (struct inode * old_dir, struct dentry * old_dentry,
}
else
mark_buffer_dirty_inode(dir_bh, old_inode);
old_dir->i_nlink --;
mark_inode_dirty(old_dir);
inode_dec_link_count(old_dir);
if (new_inode)
{
new_inode->i_nlink --;
mark_inode_dirty(new_inode);
inode_dec_link_count(new_inode);
}
else
{

2
fs/ufs/namei.c
View file

@ -308,7 +308,7 @@ static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
ufs_set_link(new_dir, new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
new_inode->i_nlink--;
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
if (dir_de) {

9
fs/vfat/namei.c
View file

@ -782,7 +782,7 @@ static int vfat_rmdir(struct inode *dir, struct dentry *dentry)
err = fat_remove_entries(dir, &sinfo); /* and releases bh */
if (err)
goto out;
dir->i_nlink--;
drop_nlink(dir);
inode->i_nlink = 0;
inode->i_mtime = inode->i_atime = CURRENT_TIME_SEC;
@ -930,7 +930,7 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
if (err)
goto error_dotdot;
}
old_dir->i_nlink--;
drop_nlink(old_dir);
if (!new_inode)
new_dir->i_nlink++;
}
@ -947,10 +947,9 @@ static int vfat_rename(struct inode *old_dir, struct dentry *old_dentry,
mark_inode_dirty(old_dir);
if (new_inode) {
drop_nlink(new_inode);
if (is_dir)
new_inode->i_nlink -= 2;
else
new_inode->i_nlink--;
drop_nlink(new_inode);
new_inode->i_ctime = ts;
}
out:

7
include/linux/fs.h
View file

@ -1225,9 +1225,14 @@ static inline void inode_inc_link_count(struct inode *inode)
mark_inode_dirty(inode);
}
static inline void inode_dec_link_count(struct inode *inode)
static inline void drop_nlink(struct inode *inode)
{
inode->i_nlink--;
}
static inline void inode_dec_link_count(struct inode *inode)
{
drop_nlink(inode);
mark_inode_dirty(inode);
}

2
ipc/mqueue.c
View file

@ -307,7 +307,7 @@ static int mqueue_unlink(struct inode *dir, struct dentry *dentry)
dir->i_ctime = dir->i_mtime = dir->i_atime = CURRENT_TIME;
dir->i_size -= DIRENT_SIZE;
inode->i_nlink--;
drop_nlink(inode);
dput(dentry);
return 0;
}

10
mm/shmem.c
View file

@ -1772,7 +1772,7 @@ static int shmem_unlink(struct inode *dir, struct dentry *dentry)
dir->i_size -= BOGO_DIRENT_SIZE;
inode->i_ctime = dir->i_ctime = dir->i_mtime = CURRENT_TIME;
inode->i_nlink--;
drop_nlink(inode);
dput(dentry); /* Undo the count from "create" - this does all the work */
return 0;
}
@ -1782,8 +1782,8 @@ static int shmem_rmdir(struct inode *dir, struct dentry *dentry)
if (!simple_empty(dentry))
return -ENOTEMPTY;
dentry->d_inode->i_nlink--;
dir->i_nlink--;
drop_nlink(dentry->d_inode);
drop_nlink(dir);
return shmem_unlink(dir, dentry);
}
@ -1804,9 +1804,9 @@ static int shmem_rename(struct inode *old_dir, struct dentry *old_dentry, struct
if (new_dentry->d_inode) {
(void) shmem_unlink(new_dir, new_dentry);
if (they_are_dirs)
old_dir->i_nlink--;
drop_nlink(old_dir);
} else if (they_are_dirs) {
old_dir->i_nlink--;
drop_nlink(old_dir);
new_dir->i_nlink++;
}