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Diffstat (limited to 'fs/ext4')
-rw-r--r--fs/ext4/ialloc.c2
-rw-r--r--fs/ext4/inode.c6
-rw-r--r--fs/ext4/ioctl.c86
3 files changed, 53 insertions, 41 deletions
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 8036b9b5376b..486e46a3918d 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -305,7 +305,7 @@ static int find_group_dir(struct super_block *sb, struct inode *parent,
* it has too few free inodes left (min_inodes) or
* it has too few free blocks left (min_blocks) or
* it's already running too large debt (max_debt).
- * Parent's group is prefered, if it doesn't satisfy these
+ * Parent's group is preferred, if it doesn't satisfy these
* conditions we search cyclically through the rest. If none
* of the groups look good we just look for a group with more
* free inodes than average (starting at parent's group).
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 945cbf6cb1fc..8fab233cb05f 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -382,7 +382,7 @@ no_block:
* @inode: owner
* @ind: descriptor of indirect block.
*
- * This function returns the prefered place for block allocation.
+ * This function returns the preferred place for block allocation.
* It is used when heuristic for sequential allocation fails.
* Rules are:
* + if there is a block to the left of our position - allocate near it.
@@ -432,12 +432,12 @@ static ext4_fsblk_t ext4_find_near(struct inode *inode, Indirect *ind)
}
/**
- * ext4_find_goal - find a prefered place for allocation.
+ * ext4_find_goal - find a preferred place for allocation.
* @inode: owner
* @block: block we want
* @partial: pointer to the last triple within a chain
*
- * Normally this function find the prefered place for block allocation,
+ * Normally this function find the preferred place for block allocation,
* returns it.
*/
static ext4_fsblk_t ext4_find_goal(struct inode *inode, ext4_lblk_t block,
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 2ed7c37f897e..25b13ede8086 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -15,6 +15,7 @@
#include <linux/time.h>
#include <linux/compat.h>
#include <linux/smp_lock.h>
+#include <linux/mount.h>
#include <asm/uaccess.h>
int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
@@ -38,24 +39,25 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
unsigned int oldflags;
unsigned int jflag;
- if (IS_RDONLY(inode))
- return -EROFS;
-
if (!is_owner_or_cap(inode))
return -EACCES;
if (get_user(flags, (int __user *) arg))
return -EFAULT;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
+
if (!S_ISDIR(inode->i_mode))
flags &= ~EXT4_DIRSYNC_FL;
+ err = -EPERM;
mutex_lock(&inode->i_mutex);
/* Is it quota file? Do not allow user to mess with it */
- if (IS_NOQUOTA(inode)) {
- mutex_unlock(&inode->i_mutex);
- return -EPERM;
- }
+ if (IS_NOQUOTA(inode))
+ goto flags_out;
+
oldflags = ei->i_flags;
/* The JOURNAL_DATA flag is modifiable only by root */
@@ -68,10 +70,8 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
* This test looks nicer. Thanks to Pauline Middelink
*/
if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
- if (!capable(CAP_LINUX_IMMUTABLE)) {
- mutex_unlock(&inode->i_mutex);
- return -EPERM;
- }
+ if (!capable(CAP_LINUX_IMMUTABLE))
+ goto flags_out;
}
/*
@@ -79,17 +79,14 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
* the relevant capability.
*/
if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) {
- if (!capable(CAP_SYS_RESOURCE)) {
- mutex_unlock(&inode->i_mutex);
- return -EPERM;
- }
+ if (!capable(CAP_SYS_RESOURCE))
+ goto flags_out;
}
-
handle = ext4_journal_start(inode, 1);
if (IS_ERR(handle)) {
- mutex_unlock(&inode->i_mutex);
- return PTR_ERR(handle);
+ err = PTR_ERR(handle);
+ goto flags_out;
}
if (IS_SYNC(inode))
handle->h_sync = 1;
@@ -107,14 +104,14 @@ int ext4_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
flags_err:
ext4_journal_stop(handle);
- if (err) {
- mutex_unlock(&inode->i_mutex);
- return err;
- }
+ if (err)
+ goto flags_out;
if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL))
err = ext4_change_inode_journal_flag(inode, jflag);
+flags_out:
mutex_unlock(&inode->i_mutex);
+ mnt_drop_write(filp->f_path.mnt);
return err;
}
case EXT4_IOC_GETVERSION:
@@ -129,14 +126,20 @@ flags_err:
if (!is_owner_or_cap(inode))
return -EPERM;
- if (IS_RDONLY(inode))
- return -EROFS;
- if (get_user(generation, (int __user *) arg))
- return -EFAULT;
+
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
+ if (get_user(generation, (int __user *) arg)) {
+ err = -EFAULT;
+ goto setversion_out;
+ }
handle = ext4_journal_start(inode, 1);
- if (IS_ERR(handle))
- return PTR_ERR(handle);
+ if (IS_ERR(handle)) {
+ err = PTR_ERR(handle);
+ goto setversion_out;
+ }
err = ext4_reserve_inode_write(handle, inode, &iloc);
if (err == 0) {
inode->i_ctime = ext4_current_time(inode);
@@ -144,6 +147,8 @@ flags_err:
err = ext4_mark_iloc_dirty(handle, inode, &iloc);
}
ext4_journal_stop(handle);
+setversion_out:
+ mnt_drop_write(filp->f_path.mnt);
return err;
}
#ifdef CONFIG_JBD2_DEBUG
@@ -179,19 +184,21 @@ flags_err:
}
return -ENOTTY;
case EXT4_IOC_SETRSVSZ: {
+ int err;
if (!test_opt(inode->i_sb, RESERVATION) ||!S_ISREG(inode->i_mode))
return -ENOTTY;
- if (IS_RDONLY(inode))
- return -EROFS;
-
if (!is_owner_or_cap(inode))
return -EACCES;
if (get_user(rsv_window_size, (int __user *)arg))
return -EFAULT;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
+
if (rsv_window_size > EXT4_MAX_RESERVE_BLOCKS)
rsv_window_size = EXT4_MAX_RESERVE_BLOCKS;
@@ -208,6 +215,7 @@ flags_err:
rsv->rsv_goal_size = rsv_window_size;
}
up_write(&ei->i_data_sem);
+ mnt_drop_write(filp->f_path.mnt);
return 0;
}
case EXT4_IOC_GROUP_EXTEND: {
@@ -218,16 +226,18 @@ flags_err:
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
- if (IS_RDONLY(inode))
- return -EROFS;
-
if (get_user(n_blocks_count, (__u32 __user *)arg))
return -EFAULT;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
+
err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count);
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
jbd2_journal_flush(EXT4_SB(sb)->s_journal);
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+ mnt_drop_write(filp->f_path.mnt);
return err;
}
@@ -239,17 +249,19 @@ flags_err:
if (!capable(CAP_SYS_RESOURCE))
return -EPERM;
- if (IS_RDONLY(inode))
- return -EROFS;
-
if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg,
sizeof(input)))
return -EFAULT;
+ err = mnt_want_write(filp->f_path.mnt);
+ if (err)
+ return err;
+
err = ext4_group_add(sb, &input);
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
jbd2_journal_flush(EXT4_SB(sb)->s_journal);
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
+ mnt_drop_write(filp->f_path.mnt);
return err;
}
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-05 14:44:02 +0000