#include "sufile.h"
+struct nilfs_sufile_info {
+ struct nilfs_mdt_info mi;
+ unsigned long ncleansegs;
+};
+
+static inline struct nilfs_sufile_info *NILFS_SUI(struct inode *sufile)
+{
+ return (struct nilfs_sufile_info *)NILFS_MDT(sufile);
+}
+
static inline unsigned long
nilfs_sufile_segment_usages_per_block(const struct inode *sufile)
{
max - curr + 1);
}
-static inline struct nilfs_sufile_header *
-nilfs_sufile_block_get_header(const struct inode *sufile,
- struct buffer_head *bh,
- void *kaddr)
-{
- return kaddr + bh_offset(bh);
-}
-
static struct nilfs_segment_usage *
nilfs_sufile_block_get_segment_usage(const struct inode *sufile, __u64 segnum,
struct buffer_head *bh, void *kaddr)
}
/**
+ * nilfs_sufile_get_ncleansegs - return the number of clean segments
+ * @sufile: inode of segment usage file
+ */
+unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile)
+{
+ return NILFS_SUI(sufile)->ncleansegs;
+}
+
+/**
* nilfs_sufile_updatev - modify multiple segment usages at a time
* @sufile: inode of segment usage file
* @segnumv: array of segment numbers
if (ret < 0)
goto out_sem;
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
- header = nilfs_sufile_block_get_header(sufile, header_bh, kaddr);
+ header = kaddr + bh_offset(header_bh);
ncleansegs = le64_to_cpu(header->sh_ncleansegs);
last_alloc = le64_to_cpu(header->sh_last_alloc);
kunmap_atomic(kaddr, KM_USER0);
kunmap_atomic(kaddr, KM_USER0);
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
- header = nilfs_sufile_block_get_header(
- sufile, header_bh, kaddr);
+ header = kaddr + bh_offset(header_bh);
le64_add_cpu(&header->sh_ncleansegs, -1);
le64_add_cpu(&header->sh_ndirtysegs, 1);
header->sh_last_alloc = cpu_to_le64(segnum);
kunmap_atomic(kaddr, KM_USER0);
+ NILFS_SUI(sufile)->ncleansegs--;
nilfs_mdt_mark_buffer_dirty(header_bh);
nilfs_mdt_mark_buffer_dirty(su_bh);
nilfs_mdt_mark_dirty(sufile);
kunmap_atomic(kaddr, KM_USER0);
nilfs_sufile_mod_counter(header_bh, -1, 1);
+ NILFS_SUI(sufile)->ncleansegs--;
+
nilfs_mdt_mark_buffer_dirty(su_bh);
nilfs_mdt_mark_dirty(sufile);
}
kunmap_atomic(kaddr, KM_USER0);
nilfs_sufile_mod_counter(header_bh, clean ? (u64)-1 : 0, dirty ? 0 : 1);
+ NILFS_SUI(sufile)->ncleansegs -= clean;
+
nilfs_mdt_mark_buffer_dirty(su_bh);
nilfs_mdt_mark_dirty(sufile);
}
nilfs_mdt_mark_buffer_dirty(su_bh);
nilfs_sufile_mod_counter(header_bh, 1, sudirty ? (u64)-1 : 0);
+ NILFS_SUI(sufile)->ncleansegs++;
+
nilfs_mdt_mark_dirty(sufile);
}
/**
- * nilfs_sufile_get_segment_usage - get a segment usage
+ * nilfs_sufile_mark_dirty - mark the buffer having a segment usage dirty
* @sufile: inode of segment usage file
* @segnum: segment number
- * @sup: pointer to segment usage
- * @bhp: pointer to buffer head
- *
- * Description: nilfs_sufile_get_segment_usage() acquires the segment usage
- * specified by @segnum.
- *
- * Return Value: On success, 0 is returned, and the segment usage and the
- * buffer head of the buffer on which the segment usage is located are stored
- * in the place pointed by @sup and @bhp, respectively. On error, one of the
- * following negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- *
- * %-EINVAL - Invalid segment usage number.
*/
-int nilfs_sufile_get_segment_usage(struct inode *sufile, __u64 segnum,
- struct nilfs_segment_usage **sup,
- struct buffer_head **bhp)
+int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum)
{
struct buffer_head *bh;
- struct nilfs_segment_usage *su;
- void *kaddr;
int ret;
- /* segnum is 0 origin */
- if (segnum >= nilfs_sufile_get_nsegments(sufile))
- return -EINVAL;
- down_write(&NILFS_MDT(sufile)->mi_sem);
- ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 1, &bh);
- if (ret < 0)
- goto out_sem;
- kaddr = kmap(bh->b_page);
- su = nilfs_sufile_block_get_segment_usage(sufile, segnum, bh, kaddr);
- if (nilfs_segment_usage_error(su)) {
- kunmap(bh->b_page);
+ ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh);
+ if (!ret) {
+ nilfs_mdt_mark_buffer_dirty(bh);
+ nilfs_mdt_mark_dirty(sufile);
brelse(bh);
- ret = -EINVAL;
- goto out_sem;
}
-
- if (sup != NULL)
- *sup = su;
- *bhp = bh;
-
- out_sem:
- up_write(&NILFS_MDT(sufile)->mi_sem);
return ret;
}
/**
- * nilfs_sufile_put_segment_usage - put a segment usage
+ * nilfs_sufile_set_segment_usage - set usage of a segment
* @sufile: inode of segment usage file
* @segnum: segment number
- * @bh: buffer head
- *
- * Description: nilfs_sufile_put_segment_usage() releases the segment usage
- * specified by @segnum. @bh must be the buffer head which have been returned
- * by a previous call to nilfs_sufile_get_segment_usage() with @segnum.
+ * @nblocks: number of live blocks in the segment
+ * @modtime: modification time (option)
*/
-void nilfs_sufile_put_segment_usage(struct inode *sufile, __u64 segnum,
- struct buffer_head *bh)
+int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
+ unsigned long nblocks, time_t modtime)
{
- kunmap(bh->b_page);
+ struct buffer_head *bh;
+ struct nilfs_segment_usage *su;
+ void *kaddr;
+ int ret;
+
+ down_write(&NILFS_MDT(sufile)->mi_sem);
+ ret = nilfs_sufile_get_segment_usage_block(sufile, segnum, 0, &bh);
+ if (ret < 0)
+ goto out_sem;
+
+ kaddr = kmap_atomic(bh->b_page, KM_USER0);
+ su = nilfs_sufile_block_get_segment_usage(sufile, segnum, bh, kaddr);
+ WARN_ON(nilfs_segment_usage_error(su));
+ if (modtime)
+ su->su_lastmod = cpu_to_le64(modtime);
+ su->su_nblocks = cpu_to_le32(nblocks);
+ kunmap_atomic(kaddr, KM_USER0);
+
+ nilfs_mdt_mark_buffer_dirty(bh);
+ nilfs_mdt_mark_dirty(sufile);
brelse(bh);
+
+ out_sem:
+ up_write(&NILFS_MDT(sufile)->mi_sem);
+ return ret;
}
/**
goto out_sem;
kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
- header = nilfs_sufile_block_get_header(sufile, header_bh, kaddr);
+ header = kaddr + bh_offset(header_bh);
sustat->ss_nsegs = nilfs_sufile_get_nsegments(sufile);
sustat->ss_ncleansegs = le64_to_cpu(header->sh_ncleansegs);
sustat->ss_ndirtysegs = le64_to_cpu(header->sh_ndirtysegs);
return ret;
}
-/**
- * nilfs_sufile_get_ncleansegs - get the number of clean segments
- * @sufile: inode of segment usage file
- * @nsegsp: pointer to the number of clean segments
- *
- * Description: nilfs_sufile_get_ncleansegs() acquires the number of clean
- * segments.
- *
- * Return Value: On success, 0 is returned and the number of clean segments is
- * stored in the place pointed by @nsegsp. On error, one of the following
- * negative error codes is returned.
- *
- * %-EIO - I/O error.
- *
- * %-ENOMEM - Insufficient amount of memory available.
- */
-int nilfs_sufile_get_ncleansegs(struct inode *sufile, unsigned long *nsegsp)
-{
- struct nilfs_sustat sustat;
- int ret;
-
- ret = nilfs_sufile_get_stat(sufile, &sustat);
- if (ret == 0)
- *nsegsp = sustat.ss_ncleansegs;
- return ret;
-}
-
void nilfs_sufile_do_set_error(struct inode *sufile, __u64 segnum,
struct buffer_head *header_bh,
struct buffer_head *su_bh)
nilfs_segment_usage_set_error(su);
kunmap_atomic(kaddr, KM_USER0);
- if (suclean)
+ if (suclean) {
nilfs_sufile_mod_counter(header_bh, -1, 0);
+ NILFS_SUI(sufile)->ncleansegs--;
+ }
nilfs_mdt_mark_buffer_dirty(su_bh);
nilfs_mdt_mark_dirty(sufile);
}
}
/**
+ * nilfs_sufile_read - read sufile inode
+ * @sufile: sufile inode
+ * @raw_inode: on-disk sufile inode
+ */
+int nilfs_sufile_read(struct inode *sufile, struct nilfs_inode *raw_inode)
+{
+ struct nilfs_sufile_info *sui = NILFS_SUI(sufile);
+ struct buffer_head *header_bh;
+ struct nilfs_sufile_header *header;
+ void *kaddr;
+ int ret;
+
+ ret = nilfs_read_inode_common(sufile, raw_inode);
+ if (ret < 0)
+ return ret;
+
+ ret = nilfs_sufile_get_header_block(sufile, &header_bh);
+ if (!ret) {
+ kaddr = kmap_atomic(header_bh->b_page, KM_USER0);
+ header = kaddr + bh_offset(header_bh);
+ sui->ncleansegs = le64_to_cpu(header->sh_ncleansegs);
+ kunmap_atomic(kaddr, KM_USER0);
+ brelse(header_bh);
+ }
+ return ret;
+}
+
+/**
* nilfs_sufile_new - create sufile
* @nilfs: nilfs object
* @susize: size of a segment usage entry
{
struct inode *sufile;
- sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO, 0);
+ sufile = nilfs_mdt_new(nilfs, NULL, NILFS_SUFILE_INO,
+ sizeof(struct nilfs_sufile_info));
if (sufile)
nilfs_mdt_set_entry_size(sufile, susize,
sizeof(struct nilfs_sufile_header));
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff