Add basic sysfs support so that information about the mounted
filesystem and various tuning parameters can be accessed via
/sys/fs/ext4/<dev>/*.
Signed-off-by: "Theodore Ts'o" <[email protected]>
---
fs/ext4/ext4_sb.h | 2 +
fs/ext4/super.c | 198 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 200 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h
index 50ab116..57b71fe 100644
--- a/fs/ext4/ext4_sb.h
+++ b/fs/ext4/ext4_sb.h
@@ -64,6 +64,8 @@ struct ext4_sb_info {
struct percpu_counter s_dirtyblocks_counter;
struct blockgroup_lock *s_blockgroup_lock;
struct proc_dir_entry *s_proc;
+ struct kobject s_kobj;
+ struct completion s_kobj_unregister;
/* Journaling */
struct inode *s_journal_inode;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c61b6a6..4257613 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -35,6 +35,7 @@
#include <linux/quotaops.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
+#include <linux/ctype.h>
#include <linux/marker.h>
#include <linux/log2.h>
#include <linux/crc16.h>
@@ -48,6 +49,7 @@
#include "group.h"
struct proc_dir_entry *ext4_proc_root;
+static struct kset *ext4_kset;
static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
unsigned long journal_devnum);
@@ -580,6 +582,8 @@ static void ext4_put_super(struct super_block *sb)
remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
+ kobject_put(&sbi->s_kobj);
+ wait_for_completion(&sbi->s_kobj_unregister);
for (i = 0; i < sbi->s_gdb_count; i++)
brelse(sbi->s_group_desc[i]);
@@ -1462,6 +1466,11 @@ set_qf_format:
return 0;
if (option < 0 || option > (1 << 30))
return 0;
+ if (option & (option - 1)) {
+ printk(KERN_ERR "EXT4-fs: inode_readahead_blks"
+ " must be a power of 2\n");
+ return 0;
+ }
sbi->s_inode_readahead_blks = option;
break;
case Opt_journal_ioprio:
@@ -1990,6 +1999,181 @@ static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi)
return 0;
}
+/* sysfs supprt */
+
+struct ext4_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *);
+ ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *,
+ const char *, size_t);
+ int offset;
+};
+
+static int parse_strtoul(const char *buf,
+ unsigned long max, unsigned long *value)
+{
+ char *endp;
+
+ while (*buf && isspace(*buf))
+ buf++;
+ *value = simple_strtoul(buf, &endp, 0);
+ while (*endp && isspace(*endp))
+ endp++;
+ if (*endp || *value > max)
+ return -EINVAL;
+
+ return 0;
+}
+
+static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi,
+ char *buf)
+{
+ return snprintf(buf, PAGE_SIZE, "%llu\n",
+ (s64) percpu_counter_sum(&sbi->s_dirtyblocks_counter));
+}
+
+static ssize_t session_write_kbytes_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ struct super_block *sb = sbi->s_buddy_cache->i_sb;
+
+ return snprintf(buf, PAGE_SIZE, "%lu\n",
+ (part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
+ sbi->s_sectors_written_start) >> 1);
+}
+
+static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ struct super_block *sb = sbi->s_buddy_cache->i_sb;
+
+ return snprintf(buf, PAGE_SIZE, "%llu\n",
+ sbi->s_kbytes_written +
+ ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) -
+ EXT4_SB(sb)->s_sectors_written_start) >> 1));
+}
+
+static ssize_t inode_readahead_blks_store(struct ext4_attr *a,
+ struct ext4_sb_info *sbi,
+ const char *buf, size_t count)
+{
+ unsigned long t;
+
+ if (parse_strtoul(buf, 0x40000000, &t))
+ return -EINVAL;
+
+ /* inode_readahead_blks must be a power of 2 */
+ if (t & (t-1))
+ return -EINVAL;
+
+ sbi->s_inode_readahead_blks = t;
+ return count;
+}
+
+static ssize_t sbi_ui_show(struct ext4_attr *a,
+ struct ext4_sb_info *sbi, char *buf)
+{
+ unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", *ui);
+}
+
+static ssize_t sbi_ui_store(struct ext4_attr *a,
+ struct ext4_sb_info *sbi,
+ const char *buf, size_t count)
+{
+ unsigned int *ui = (unsigned int *) (((char *) sbi) + a->offset);
+ unsigned long t;
+
+ if (parse_strtoul(buf, 0xffffffff, &t))
+ return -EINVAL;
+ *ui = t;
+ return count;
+}
+
+#define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \
+static struct ext4_attr ext4_attr_##_name = { \
+ .attr = {.name = __stringify(_name), .mode = _mode }, \
+ .show = _show, \
+ .store = _store, \
+ .offset = offsetof(struct ext4_sb_info, _elname), \
+}
+#define EXT4_ATTR(name, mode, show, store) \
+static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store)
+
+#define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL)
+#define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store)
+#define EXT4_RW_ATTR_SBI_UI(name, elname) \
+ EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname)
+#define ATTR_LIST(name) &ext4_attr_##name.attr
+
+EXT4_RO_ATTR(delayed_allocation_blocks);
+EXT4_RO_ATTR(session_write_kbytes);
+EXT4_RO_ATTR(lifetime_write_kbytes);
+EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show,
+ inode_readahead_blks_store, s_inode_readahead_blks);
+EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats);
+EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan);
+EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
+EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
+EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
+EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
+
+static struct attribute *ext4_attrs[] = {
+ ATTR_LIST(delayed_allocation_blocks),
+ ATTR_LIST(session_write_kbytes),
+ ATTR_LIST(lifetime_write_kbytes),
+ ATTR_LIST(inode_readahead_blks),
+ ATTR_LIST(mb_stats),
+ ATTR_LIST(mb_max_to_scan),
+ ATTR_LIST(mb_min_to_scan),
+ ATTR_LIST(mb_order2_req),
+ ATTR_LIST(mb_stream_req),
+ ATTR_LIST(mb_group_prealloc),
+ NULL,
+};
+
+static ssize_t ext4_attr_show(struct kobject *kobj,
+ struct attribute *attr, char *buf)
+{
+ struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
+ s_kobj);
+ struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
+
+ return a->show ? a->show(a, sbi, buf) : 0;
+}
+
+static ssize_t ext4_attr_store(struct kobject *kobj,
+ struct attribute *attr,
+ const char *buf, size_t len)
+{
+ struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
+ s_kobj);
+ struct ext4_attr *a = container_of(attr, struct ext4_attr, attr);
+
+ return a->store ? a->store(a, sbi, buf, len) : 0;
+}
+
+static void ext4_sb_release(struct kobject *kobj)
+{
+ struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info,
+ s_kobj);
+ complete(&sbi->s_kobj_unregister);
+}
+
+
+static struct sysfs_ops ext4_attr_ops = {
+ .show = ext4_attr_show,
+ .store = ext4_attr_store,
+};
+
+static struct kobj_type ext4_ktype = {
+ .default_attrs = ext4_attrs,
+ .sysfs_ops = &ext4_attr_ops,
+ .release = ext4_sb_release,
+};
+
static int ext4_fill_super(struct super_block *sb, void *data, int silent)
__releases(kernel_lock)
__acquires(kernel_lock)
@@ -2573,6 +2757,16 @@ no_journal:
goto failed_mount4;
}
+ sbi->s_kobj.kset = ext4_kset;
+ init_completion(&sbi->s_kobj_unregister);
+ err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL,
+ "%s", sb->s_id);
+ if (err) {
+ ext4_mb_release(sb);
+ ext4_ext_release(sb);
+ goto failed_mount4;
+ };
+
/*
* akpm: core read_super() calls in here with the superblock locked.
* That deadlocks, because orphan cleanup needs to lock the superblock
@@ -3770,6 +3964,9 @@ static int __init init_ext4_fs(void)
{
int err;
+ ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj);
+ if (!ext4_kset)
+ return -ENOMEM;
ext4_proc_root = proc_mkdir("fs/ext4", NULL);
err = init_ext4_mballoc();
if (err)
@@ -3811,6 +4008,7 @@ static void __exit exit_ext4_fs(void)
exit_ext4_xattr();
exit_ext4_mballoc();
remove_proc_entry("fs/ext4", NULL);
+ kset_unregister(ext4_kset);
}
MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");
--
1.5.6.3
Remove tuning knobs in /proc/fs/ext4/<dev/* since they have been
replaced by knobs in sysfs at /sys/fs/ext4/<dev>/*.
Signed-off-by: "Theodore Ts'o" <[email protected]>
---
fs/ext4/ext4.h | 16 -------
fs/ext4/inode.c | 7 +---
fs/ext4/mballoc.c | 117 +++++++++++++----------------------------------------
fs/ext4/super.c | 46 ---------------------
4 files changed, 30 insertions(+), 156 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 5621eb0..2c165fa 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -975,22 +975,6 @@ void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
extern struct proc_dir_entry *ext4_proc_root;
-#ifdef CONFIG_PROC_FS
-extern const struct file_operations ext4_ui_proc_fops;
-
-#define EXT4_PROC_HANDLER(name, var) \
-do { \
- proc = proc_create_data(name, mode, sbi->s_proc, \
- &ext4_ui_proc_fops, &sbi->s_##var); \
- if (proc == NULL) { \
- printk(KERN_ERR "EXT4-fs: can't create %s\n", name); \
- goto err_out; \
- } \
-} while (0)
-#else
-#define EXT4_PROC_HANDLER(name, var)
-#endif
-
/*
* Function prototypes
*/
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 8815b9c..b8e3412 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4124,12 +4124,7 @@ make_io:
unsigned num;
table = ext4_inode_table(sb, gdp);
- /* Make sure s_inode_readahead_blks is a power of 2 */
- while (EXT4_SB(sb)->s_inode_readahead_blks &
- (EXT4_SB(sb)->s_inode_readahead_blks-1))
- EXT4_SB(sb)->s_inode_readahead_blks =
- (EXT4_SB(sb)->s_inode_readahead_blks &
- (EXT4_SB(sb)->s_inode_readahead_blks-1));
+ /* s_inode_readahead_blks is always a power of 2 */
b = block & ~(EXT4_SB(sb)->s_inode_readahead_blks-1);
if (table > b)
b = table;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 0430143..7e729cb 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -46,22 +46,23 @@
* The allocation request involve request for multiple number of blocks
* near to the goal(block) value specified.
*
- * During initialization phase of the allocator we decide to use the group
- * preallocation or inode preallocation depending on the size file. The
- * size of the file could be the resulting file size we would have after
- * allocation or the current file size which ever is larger. If the size is
- * less that sbi->s_mb_stream_request we select the group
- * preallocation. The default value of s_mb_stream_request is 16
- * blocks. This can also be tuned via
- * /proc/fs/ext4/<partition>/stream_req. The value is represented in terms
- * of number of blocks.
+ * During initialization phase of the allocator we decide to use the
+ * group preallocation or inode preallocation depending on the size of
+ * the file. The size of the file could be the resulting file size we
+ * would have after allocation, or the current file size, which ever
+ * is larger. If the size is less than sbi->s_mb_stream_request we
+ * select to use the group preallocation. The default value of
+ * s_mb_stream_request is 16 blocks. This can also be tuned via
+ * /sys/fs/ext4/<partition>/mb_stream_req. The value is represented in
+ * terms of number of blocks.
*
* The main motivation for having small file use group preallocation is to
- * ensure that we have small file closer in the disk.
+ * ensure that we have small files closer together on the disk.
*
- * First stage the allocator looks at the inode prealloc list
- * ext4_inode_info->i_prealloc_list contain list of prealloc spaces for
- * this particular inode. The inode prealloc space is represented as:
+ * First stage the allocator looks at the inode prealloc list,
+ * ext4_inode_info->i_prealloc_list, which contains list of prealloc
+ * spaces for this particular inode. The inode prealloc space is
+ * represented as:
*
* pa_lstart -> the logical start block for this prealloc space
* pa_pstart -> the physical start block for this prealloc space
@@ -121,29 +122,29 @@
* list. In case of inode preallocation we follow a list of heuristics
* based on file size. This can be found in ext4_mb_normalize_request. If
* we are doing a group prealloc we try to normalize the request to
- * sbi->s_mb_group_prealloc. Default value of s_mb_group_prealloc is set to
+ * sbi->s_mb_group_prealloc. Default value of s_mb_group_prealloc is
* 512 blocks. This can be tuned via
- * /proc/fs/ext4/<partition/group_prealloc. The value is represented in
+ * /sys/fs/ext4/<partition/mb_group_prealloc. The value is represented in
* terms of number of blocks. If we have mounted the file system with -O
* stripe=<value> option the group prealloc request is normalized to the
* stripe value (sbi->s_stripe)
*
- * The regular allocator(using the buddy cache) support few tunables.
+ * The regular allocator(using the buddy cache) supports few tunables.
*
- * /proc/fs/ext4/<partition>/min_to_scan
- * /proc/fs/ext4/<partition>/max_to_scan
- * /proc/fs/ext4/<partition>/order2_req
+ * /sys/fs/ext4/<partition>/mb_min_to_scan
+ * /sys/fs/ext4/<partition>/mb_max_to_scan
+ * /sys/fs/ext4/<partition>/mb_order2_req
*
- * The regular allocator use buddy scan only if the request len is power of
+ * The regular allocator uses buddy scan only if the request len is power of
* 2 blocks and the order of allocation is >= sbi->s_mb_order2_reqs. The
* value of s_mb_order2_reqs can be tuned via
- * /proc/fs/ext4/<partition>/order2_req. If the request len is equal to
+ * /sys/fs/ext4/<partition>/mb_order2_req. If the request len is equal to
* stripe size (sbi->s_stripe), we try to search for contigous block in
- * stripe size. This should result in better allocation on RAID setup. If
- * not we search in the specific group using bitmap for best extents. The
- * tunable min_to_scan and max_to_scan controll the behaviour here.
+ * stripe size. This should result in better allocation on RAID setups. If
+ * not, we search in the specific group using bitmap for best extents. The
+ * tunable min_to_scan and max_to_scan control the behaviour here.
* min_to_scan indicate how long the mballoc __must__ look for a best
- * extent and max_to_scanindicate how long the mballoc __can__ look for a
+ * extent and max_to_scan indicates how long the mballoc __can__ look for a
* best extent in the found extents. Searching for the blocks starts with
* the group specified as the goal value in allocation context via
* ac_g_ex. Each group is first checked based on the criteria whether it
@@ -337,8 +338,6 @@ static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
ext4_group_t group);
static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap,
ext4_group_t group);
-static int ext4_mb_init_per_dev_proc(struct super_block *sb);
-static int ext4_mb_destroy_per_dev_proc(struct super_block *sb);
static void release_blocks_on_commit(journal_t *journal, transaction_t *txn);
@@ -1978,7 +1977,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
/*
* We search using buddy data only if the order of the request
* is greater than equal to the sbi_s_mb_order2_reqs
- * You can tune it via /proc/fs/ext4/<partition>/order2_req
+ * You can tune it via /sys/fs/ext4/<partition>/mb_order2_req
*/
if (i >= sbi->s_mb_order2_reqs) {
/*
@@ -2753,7 +2752,6 @@ int ext4_mb_init(struct super_block *sb, int needs_recovery)
spin_lock_init(&lg->lg_prealloc_lock);
}
- ext4_mb_init_per_dev_proc(sb);
ext4_mb_history_init(sb);
if (sbi->s_journal)
@@ -2836,7 +2834,6 @@ int ext4_mb_release(struct super_block *sb)
free_percpu(sbi->s_locality_groups);
ext4_mb_history_release(sb);
- ext4_mb_destroy_per_dev_proc(sb);
return 0;
}
@@ -2897,62 +2894,6 @@ static void release_blocks_on_commit(journal_t *journal, transaction_t *txn)
mb_debug("freed %u blocks in %u structures\n", count, count2);
}
-#define EXT4_MB_STATS_NAME "stats"
-#define EXT4_MB_MAX_TO_SCAN_NAME "max_to_scan"
-#define EXT4_MB_MIN_TO_SCAN_NAME "min_to_scan"
-#define EXT4_MB_ORDER2_REQ "order2_req"
-#define EXT4_MB_STREAM_REQ "stream_req"
-#define EXT4_MB_GROUP_PREALLOC "group_prealloc"
-
-static int ext4_mb_init_per_dev_proc(struct super_block *sb)
-{
-#ifdef CONFIG_PROC_FS
- mode_t mode = S_IFREG | S_IRUGO | S_IWUSR;
- struct ext4_sb_info *sbi = EXT4_SB(sb);
- struct proc_dir_entry *proc;
-
- if (sbi->s_proc == NULL)
- return -EINVAL;
-
- EXT4_PROC_HANDLER(EXT4_MB_STATS_NAME, mb_stats);
- EXT4_PROC_HANDLER(EXT4_MB_MAX_TO_SCAN_NAME, mb_max_to_scan);
- EXT4_PROC_HANDLER(EXT4_MB_MIN_TO_SCAN_NAME, mb_min_to_scan);
- EXT4_PROC_HANDLER(EXT4_MB_ORDER2_REQ, mb_order2_reqs);
- EXT4_PROC_HANDLER(EXT4_MB_STREAM_REQ, mb_stream_request);
- EXT4_PROC_HANDLER(EXT4_MB_GROUP_PREALLOC, mb_group_prealloc);
- return 0;
-
-err_out:
- remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_proc);
- remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_proc);
- remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_proc);
- remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_proc);
- remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_proc);
- remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_proc);
- return -ENOMEM;
-#else
- return 0;
-#endif
-}
-
-static int ext4_mb_destroy_per_dev_proc(struct super_block *sb)
-{
-#ifdef CONFIG_PROC_FS
- struct ext4_sb_info *sbi = EXT4_SB(sb);
-
- if (sbi->s_proc == NULL)
- return -EINVAL;
-
- remove_proc_entry(EXT4_MB_GROUP_PREALLOC, sbi->s_proc);
- remove_proc_entry(EXT4_MB_STREAM_REQ, sbi->s_proc);
- remove_proc_entry(EXT4_MB_ORDER2_REQ, sbi->s_proc);
- remove_proc_entry(EXT4_MB_MIN_TO_SCAN_NAME, sbi->s_proc);
- remove_proc_entry(EXT4_MB_MAX_TO_SCAN_NAME, sbi->s_proc);
- remove_proc_entry(EXT4_MB_STATS_NAME, sbi->s_proc);
-#endif
- return 0;
-}
-
int __init init_ext4_mballoc(void)
{
ext4_pspace_cachep =
@@ -3120,7 +3061,7 @@ out_err:
* here we normalize request for locality group
* Group request are normalized to s_strip size if we set the same via mount
* option. If not we set it to s_mb_group_prealloc which can be configured via
- * /proc/fs/ext4/<partition>/group_prealloc
+ * /sys/fs/ext4/<partition>/mb_group_prealloc
*
* XXX: should we try to preallocate more than the group has now?
*/
@@ -4231,7 +4172,7 @@ static inline void ext4_mb_show_ac(struct ext4_allocation_context *ac)
* file is determined by the current size or the resulting size after
* allocation which ever is larger
*
- * One can tune this size via /proc/fs/ext4/<partition>/stream_req
+ * One can tune this size via /sys/fs/ext4/<partition>/mb_stream_req
*/
static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
{
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 4257613..904bbab 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -579,7 +579,6 @@ static void ext4_put_super(struct super_block *sb)
ext4_commit_super(sb, es, 1);
}
if (sbi->s_proc) {
- remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
kobject_put(&sbi->s_kobj);
@@ -2518,11 +2517,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
#ifdef CONFIG_PROC_FS
if (ext4_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
-
- if (sbi->s_proc)
- proc_create_data("inode_readahead_blks", 0644, sbi->s_proc,
- &ext4_ui_proc_fops,
- &sbi->s_inode_readahead_blks);
#endif
bgl_lock_init(sbi->s_blockgroup_lock);
@@ -2821,7 +2815,6 @@ failed_mount2:
kfree(sbi->s_group_desc);
failed_mount:
if (sbi->s_proc) {
- remove_proc_entry("inode_readahead_blks", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
#ifdef CONFIG_QUOTA
@@ -3892,45 +3885,6 @@ static int ext4_get_sb(struct file_system_type *fs_type,
return get_sb_bdev(fs_type, flags, dev_name, data, ext4_fill_super, mnt);
}
-#ifdef CONFIG_PROC_FS
-static int ext4_ui_proc_show(struct seq_file *m, void *v)
-{
- unsigned int *p = m->private;
-
- seq_printf(m, "%u\n", *p);
- return 0;
-}
-
-static int ext4_ui_proc_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ext4_ui_proc_show, PDE(inode)->data);
-}
-
-static ssize_t ext4_ui_proc_write(struct file *file, const char __user *buf,
- size_t cnt, loff_t *ppos)
-{
- unsigned long *p = PDE(file->f_path.dentry->d_inode)->data;
- char str[32];
-
- if (cnt >= sizeof(str))
- return -EINVAL;
- if (copy_from_user(str, buf, cnt))
- return -EFAULT;
-
- *p = simple_strtoul(str, NULL, 0);
- return cnt;
-}
-
-const struct file_operations ext4_ui_proc_fops = {
- .owner = THIS_MODULE,
- .open = ext4_ui_proc_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = ext4_ui_proc_write,
-};
-#endif
On Sat, Feb 28, 2009 at 10:48:07PM -0500, Theodore Ts'o wrote:
> Add basic sysfs support so that information about the mounted
> filesystem and various tuning parameters can be accessed via
> /sys/fs/ext4/<dev>/*.
>
> Signed-off-by: "Theodore Ts'o" <[email protected]>
> ---
> fs/ext4/ext4_sb.h | 2 +
> fs/ext4/super.c | 198 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 200 insertions(+), 0 deletions(-)
>
This needs documentation in Documentation/ABI/testing.
-aneesh
On Sat, Feb 28, 2009 at 10:48:08PM -0500, Theodore Ts'o wrote:
> Remove tuning knobs in /proc/fs/ext4/<dev/* since they have been
> replaced by knobs in sysfs at /sys/fs/ext4/<dev>/*.
>
> Signed-off-by: "Theodore Ts'o" <[email protected]>
> ---
> fs/ext4/ext4.h | 16 -------
> fs/ext4/inode.c | 7 +---
> fs/ext4/mballoc.c | 117 +++++++++++++----------------------------------------
> fs/ext4/super.c | 46 ---------------------
> 4 files changed, 30 insertions(+), 156 deletions(-)
>
This patch would need changes to Documentation/filesystems/proc.txt
-aneesh
On Mon, Mar 30, 2009 at 03:40:34PM +0530, Aneesh Kumar K.V wrote:
> On Sat, Feb 28, 2009 at 10:48:07PM -0500, Theodore Ts'o wrote:
> > Add basic sysfs support so that information about the mounted
> > filesystem and various tuning parameters can be accessed via
> > /sys/fs/ext4/<dev>/*.
> >
> > Signed-off-by: "Theodore Ts'o" <[email protected]>
> > ---
> > fs/ext4/ext4_sb.h | 2 +
> > fs/ext4/super.c | 198 +++++++++++++++++++++++++++++++++++++++++++++++++++++
> > 2 files changed, 200 insertions(+), 0 deletions(-)
> >
>
> This needs documentation in Documentation/ABI/testing.
Good point, added, thanks.
- Ted
On Mon, Mar 30, 2009 at 03:41:37PM +0530, Aneesh Kumar K.V wrote:
> On Sat, Feb 28, 2009 at 10:48:08PM -0500, Theodore Ts'o wrote:
> > Remove tuning knobs in /proc/fs/ext4/<dev/* since they have been
> > replaced by knobs in sysfs at /sys/fs/ext4/<dev>/*.
> >
> > Signed-off-by: "Theodore Ts'o" <[email protected]>
> > ---
> > fs/ext4/ext4.h | 16 -------
> > fs/ext4/inode.c | 7 +---
> > fs/ext4/mballoc.c | 117 +++++++++++++----------------------------------------
> > fs/ext4/super.c | 46 ---------------------
> > 4 files changed, 30 insertions(+), 156 deletions(-)
> >
>
> This patch would need changes to Documentation/filesystems/proc.txt
Good point, added, thanks.
- Ted