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Message-ID: <4D9EBEBF.9040608@sx.jp.nec.com>
Date: Fri, 08 Apr 2011 16:52:31 +0900
From: Kazuya Mio <k-mio@...jp.nec.com>
To: ext4 <linux-ext4@...r.kernel.org>, Theodore Tso <tytso@....edu>
Subject: [PATCH 06/11] e4defrag: Allow user who has read+write access to defrag
Anyone who has read+write access can defrag the file for this fix.
Currently, non-root user needs owner authority to defrag the file. But non-root
user who is not owner might have read+write access.
Signed-off-by: Kazuya Mio <k-mio@...jp.nec.com>
---
misc/e4defrag.8.in | 3 +--
misc/e4defrag.c | 25 ++++---------------------
2 files changed, 5 insertions(+), 23 deletions(-)
diff --git a/misc/e4defrag.8.in b/misc/e4defrag.8.in
index 81adc29..1159fd6 100644
--- a/misc/e4defrag.8.in
+++ b/misc/e4defrag.8.in
@@ -43,9 +43,8 @@ is a device or a mount point,
.B e4defrag
doesn't defragment files in mount point of other device.
.PP
-Non-privileged users can execute
.B e4defrag
-to their own file.
+can be called for the file only if read and write access are allowed.
.SH AUTHOR
Written by Akira Fujita <a-fujita@...jp.nec.com> and Takashi Sato
<t-sato@...jp.nec.com>.
diff --git a/misc/e4defrag.c b/misc/e4defrag.c
index 417639d..f4ced9a 100644
--- a/misc/e4defrag.c
+++ b/misc/e4defrag.c
@@ -148,7 +148,6 @@ int block_size;
int extents_before_defrag;
int extents_after_defrag;
int mode_flag;
-unsigned int current_uid;
unsigned int defraged_file_count;
unsigned int frag_files_before_defrag;
unsigned int frag_files_after_defrag;
@@ -466,6 +465,7 @@ static int check_free_size(int fd, const char *file, ext4_fsblk_t blk_count)
{
ext4_fsblk_t free_blk_count;
struct statfs64 fsbuf;
+ uid_t current_uid = getuid();
if (fstatfs64(fd, &fsbuf) < 0) {
if (mode_flag & DETAIL) {
@@ -517,13 +517,12 @@ static int file_frag_count(int fd)
* file_check() - Check file's attributes.
*
* @fd: defrag target file's descriptor.
- * @buf: a pointer of the struct stat64.
* @file: file name.
* @extents: file extents.
* @blk_count: file blocks.
*/
-static int file_check(int fd, const struct stat64 *buf, const char *file,
- int extents, ext4_fsblk_t blk_count)
+static int file_check(int fd, const char *file, int extents,
+ ext4_fsblk_t blk_count)
{
int ret;
struct flock lock;
@@ -547,20 +546,6 @@ static int file_check(int fd, const struct stat64 *buf, const char *file,
return -1;
}
- /* Access authority */
- if (current_uid != ROOT_UID &&
- buf->st_uid != current_uid) {
- if (mode_flag & DETAIL) {
- printf("\033[79;0H\033[K[%u/%u] \"%s\"\t\t"
- " extents: %d -> %d\n", defraged_file_count,
- total_count, file, extents, extents);
- IN_FTW_PRINT_ERR_MSG(
- "File is not current user's file"
- " or current user is not root");
- }
- return -1;
- }
-
/* Lock status */
if (fcntl(fd, F_GETLK, &lock) < 0) {
if (mode_flag & DETAIL) {
@@ -1040,7 +1025,7 @@ static int file_defrag(const char *file, const struct stat64 *buf,
file_frags_start = get_exts_count(orig_list);
blk_count = get_file_blocks(orig_list);
- if (file_check(fd, buf, file, file_frags_start, blk_count) < 0)
+ if (file_check(fd, file, file_frags_start, blk_count) < 0)
goto out;
if (fsync(fd) < 0) {
@@ -1243,8 +1228,6 @@ int main(int argc, char *argv[])
if (argc == optind)
goto out;
- current_uid = getuid();
-
/* Main process */
for (i = optind; i < argc; i++) {
succeed_cnt = 0;
--
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