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Diffstat (limited to 'fs/ext2/namei.c')
-rw-r--r--fs/ext2/namei.c177
1 files changed, 105 insertions, 72 deletions
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 80c97fd8c57..c268d0af1db 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -31,6 +31,7 @@
*/
#include <linux/pagemap.h>
+#include <linux/quotaops.h>
#include "ext2.h"
#include "xattr.h"
#include "acl.h"
@@ -40,10 +41,12 @@ static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
{
int err = ext2_add_link(dentry, inode);
if (!err) {
+ unlock_new_inode(inode);
d_instantiate(dentry, inode);
return 0;
}
inode_dec_link_count(inode);
+ unlock_new_inode(inode);
iput(inode);
return err;
}
@@ -52,7 +55,7 @@ static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
* Methods themselves.
*/
-static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, struct nameidata *nd)
+static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, unsigned int flags)
{
struct inode * inode;
ino_t ino;
@@ -60,39 +63,27 @@ static struct dentry *ext2_lookup(struct inode * dir, struct dentry *dentry, str
if (dentry->d_name.len > EXT2_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
- ino = ext2_inode_by_name(dir, dentry);
+ ino = ext2_inode_by_name(dir, &dentry->d_name);
inode = NULL;
if (ino) {
inode = ext2_iget(dir->i_sb, ino);
- if (IS_ERR(inode))
- return ERR_CAST(inode);
+ if (inode == ERR_PTR(-ESTALE)) {
+ ext2_error(dir->i_sb, __func__,
+ "deleted inode referenced: %lu",
+ (unsigned long) ino);
+ return ERR_PTR(-EIO);
+ }
}
return d_splice_alias(inode, dentry);
}
struct dentry *ext2_get_parent(struct dentry *child)
{
- unsigned long ino;
- struct dentry *parent;
- struct inode *inode;
- struct dentry dotdot;
-
- dotdot.d_name.name = "..";
- dotdot.d_name.len = 2;
-
- ino = ext2_inode_by_name(child->d_inode, &dotdot);
+ struct qstr dotdot = QSTR_INIT("..", 2);
+ unsigned long ino = ext2_inode_by_name(child->d_inode, &dotdot);
if (!ino)
return ERR_PTR(-ENOENT);
- inode = ext2_iget(child->d_inode->i_sb, ino);
-
- if (IS_ERR(inode))
- return ERR_CAST(inode);
- parent = d_alloc_anon(inode);
- if (!parent) {
- iput(inode);
- parent = ERR_PTR(-ENOMEM);
- }
- return parent;
+ return d_obtain_alias(ext2_iget(child->d_inode->i_sb, ino));
}
/*
@@ -103,29 +94,55 @@ struct dentry *ext2_get_parent(struct dentry *child)
* If the create succeeds, we fill in the inode information
* with d_instantiate().
*/
-static int ext2_create (struct inode * dir, struct dentry * dentry, int mode, struct nameidata *nd)
+static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode, bool excl)
{
- struct inode * inode = ext2_new_inode (dir, mode);
- int err = PTR_ERR(inode);
- if (!IS_ERR(inode)) {
- inode->i_op = &ext2_file_inode_operations;
- if (ext2_use_xip(inode->i_sb)) {
- inode->i_mapping->a_ops = &ext2_aops_xip;
- inode->i_fop = &ext2_xip_file_operations;
- } else if (test_opt(inode->i_sb, NOBH)) {
- inode->i_mapping->a_ops = &ext2_nobh_aops;
- inode->i_fop = &ext2_file_operations;
- } else {
- inode->i_mapping->a_ops = &ext2_aops;
- inode->i_fop = &ext2_file_operations;
- }
- mark_inode_dirty(inode);
- err = ext2_add_nondir(dentry, inode);
+ struct inode *inode;
+
+ dquot_initialize(dir);
+
+ inode = ext2_new_inode(dir, mode, &dentry->d_name);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &ext2_file_inode_operations;
+ if (ext2_use_xip(inode->i_sb)) {
+ inode->i_mapping->a_ops = &ext2_aops_xip;
+ inode->i_fop = &ext2_xip_file_operations;
+ } else if (test_opt(inode->i_sb, NOBH)) {
+ inode->i_mapping->a_ops = &ext2_nobh_aops;
+ inode->i_fop = &ext2_file_operations;
+ } else {
+ inode->i_mapping->a_ops = &ext2_aops;
+ inode->i_fop = &ext2_file_operations;
}
- return err;
+ mark_inode_dirty(inode);
+ return ext2_add_nondir(dentry, inode);
}
-static int ext2_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_t rdev)
+static int ext2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+ struct inode *inode = ext2_new_inode(dir, mode, NULL);
+ if (IS_ERR(inode))
+ return PTR_ERR(inode);
+
+ inode->i_op = &ext2_file_inode_operations;
+ if (ext2_use_xip(inode->i_sb)) {
+ inode->i_mapping->a_ops = &ext2_aops_xip;
+ inode->i_fop = &ext2_xip_file_operations;
+ } else if (test_opt(inode->i_sb, NOBH)) {
+ inode->i_mapping->a_ops = &ext2_nobh_aops;
+ inode->i_fop = &ext2_file_operations;
+ } else {
+ inode->i_mapping->a_ops = &ext2_aops;
+ inode->i_fop = &ext2_file_operations;
+ }
+ mark_inode_dirty(inode);
+ d_tmpfile(dentry, inode);
+ unlock_new_inode(inode);
+ return 0;
+}
+
+static int ext2_mknod (struct inode * dir, struct dentry *dentry, umode_t mode, dev_t rdev)
{
struct inode * inode;
int err;
@@ -133,7 +150,9 @@ static int ext2_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_
if (!new_valid_dev(rdev))
return -EINVAL;
- inode = ext2_new_inode (dir, mode);
+ dquot_initialize(dir);
+
+ inode = ext2_new_inode (dir, mode, &dentry->d_name);
err = PTR_ERR(inode);
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
@@ -157,7 +176,9 @@ static int ext2_symlink (struct inode * dir, struct dentry * dentry,
if (l > sb->s_blocksize)
goto out;
- inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO);
+ dquot_initialize(dir);
+
+ inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO, &dentry->d_name);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out;
@@ -186,6 +207,7 @@ out:
out_fail:
inode_dec_link_count(inode);
+ unlock_new_inode(inode);
iput (inode);
goto out;
}
@@ -194,28 +216,34 @@ static int ext2_link (struct dentry * old_dentry, struct inode * dir,
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
+ int err;
- if (inode->i_nlink >= EXT2_LINK_MAX)
- return -EMLINK;
+ dquot_initialize(dir);
inode->i_ctime = CURRENT_TIME_SEC;
inode_inc_link_count(inode);
- atomic_inc(&inode->i_count);
+ ihold(inode);
- return ext2_add_nondir(dentry, inode);
+ err = ext2_add_link(dentry, inode);
+ if (!err) {
+ d_instantiate(dentry, inode);
+ return 0;
+ }
+ inode_dec_link_count(inode);
+ iput(inode);
+ return err;
}
-static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode)
+static int ext2_mkdir(struct inode * dir, struct dentry * dentry, umode_t mode)
{
struct inode * inode;
- int err = -EMLINK;
+ int err;
- if (dir->i_nlink >= EXT2_LINK_MAX)
- goto out;
+ dquot_initialize(dir);
inode_inc_link_count(dir);
- inode = ext2_new_inode (dir, S_IFDIR | mode);
+ inode = ext2_new_inode(dir, S_IFDIR | mode, &dentry->d_name);
err = PTR_ERR(inode);
if (IS_ERR(inode))
goto out_dir;
@@ -237,6 +265,7 @@ static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode)
if (err)
goto out_fail;
+ unlock_new_inode(inode);
d_instantiate(dentry, inode);
out:
return err;
@@ -244,6 +273,7 @@ out:
out_fail:
inode_dec_link_count(inode);
inode_dec_link_count(inode);
+ unlock_new_inode(inode);
iput(inode);
out_dir:
inode_dec_link_count(dir);
@@ -257,7 +287,9 @@ static int ext2_unlink(struct inode * dir, struct dentry *dentry)
struct page * page;
int err = -ENOENT;
- de = ext2_find_entry (dir, dentry, &page);
+ dquot_initialize(dir);
+
+ de = ext2_find_entry (dir, &dentry->d_name, &page);
if (!de)
goto out;
@@ -299,7 +331,10 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
struct ext2_dir_entry_2 * old_de;
int err = -ENOENT;
- old_de = ext2_find_entry (old_dir, old_dentry, &old_page);
+ dquot_initialize(old_dir);
+ dquot_initialize(new_dir);
+
+ old_de = ext2_find_entry (old_dir, &old_dentry->d_name, &old_page);
if (!old_de)
goto out;
@@ -319,27 +354,18 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
goto out_dir;
err = -ENOENT;
- new_de = ext2_find_entry (new_dir, new_dentry, &new_page);
+ new_de = ext2_find_entry (new_dir, &new_dentry->d_name, &new_page);
if (!new_de)
goto out_dir;
- inode_inc_link_count(old_inode);
- ext2_set_link(new_dir, new_de, new_page, old_inode);
+ ext2_set_link(new_dir, new_de, new_page, old_inode, 1);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
drop_nlink(new_inode);
inode_dec_link_count(new_inode);
} else {
- if (dir_de) {
- err = -EMLINK;
- if (new_dir->i_nlink >= EXT2_LINK_MAX)
- goto out_dir;
- }
- inode_inc_link_count(old_inode);
err = ext2_add_link(new_dentry, old_inode);
- if (err) {
- inode_dec_link_count(old_inode);
+ if (err)
goto out_dir;
- }
if (dir_de)
inode_inc_link_count(new_dir);
}
@@ -347,15 +373,19 @@ static int ext2_rename (struct inode * old_dir, struct dentry * old_dentry,
/*
* Like most other Unix systems, set the ctime for inodes on a
* rename.
- * inode_dec_link_count() will mark the inode dirty.
*/
old_inode->i_ctime = CURRENT_TIME_SEC;
+ mark_inode_dirty(old_inode);
ext2_delete_entry (old_de, old_page);
- inode_dec_link_count(old_inode);
if (dir_de) {
- ext2_set_link(old_inode, dir_de, dir_page, new_dir);
+ if (old_dir != new_dir)
+ ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0);
+ else {
+ kunmap(dir_page);
+ page_cache_release(dir_page);
+ }
inode_dec_link_count(old_dir);
}
return 0;
@@ -390,7 +420,9 @@ const struct inode_operations ext2_dir_inode_operations = {
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
- .permission = ext2_permission,
+ .get_acl = ext2_get_acl,
+ .set_acl = ext2_set_acl,
+ .tmpfile = ext2_tmpfile,
};
const struct inode_operations ext2_special_inode_operations = {
@@ -401,5 +433,6 @@ const struct inode_operations ext2_special_inode_operations = {
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
- .permission = ext2_permission,
+ .get_acl = ext2_get_acl,
+ .set_acl = ext2_set_acl,
};
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 07:26:14 +0000