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Merge git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6 

* git://git.kernel.org/pub/scm/linux/kernel/git/hirofumi/fatfs-2.6:
  fat: make discard a mount option
This commit is contained in:
Linus Torvalds 2009-12-16 10:29:26 -08:00
parent 7949456b1b 681142f921
commit 337e4a1ab4
3 changed files with 23 additions and 11 deletions
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3
fs/fat/fat.h
View File

@ -44,7 +44,8 @@ struct fat_mount_options {
nocase:1, /* Does this need case conversion? 0=need case conversion*/
usefree:1, /* Use free_clusters for FAT32 */
tz_utc:1, /* Filesystem timestamps are in UTC */
rodir:1; /* allow ATTR_RO for directory */
rodir:1, /* allow ATTR_RO for directory */
discard:1; /* Issue discard requests on deletions */
};
#define FAT_HASH_BITS 8

23
fs/fat/fatent.c
View File

@ -566,16 +566,21 @@ int fat_free_clusters(struct inode *inode, int cluster)
goto error;
}
/*
* Issue discard for the sectors we no longer care about,
* batching contiguous clusters into one request
*/
if (cluster != fatent.entry + 1) {
int nr_clus = fatent.entry - first_cl + 1;
if (sbi->options.discard) {
/*
* Issue discard for the sectors we no longer
* care about, batching contiguous clusters
* into one request
*/
if (cluster != fatent.entry + 1) {
int nr_clus = fatent.entry - first_cl + 1;
sb_issue_discard(sb, fat_clus_to_blknr(sbi, first_cl),
nr_clus * sbi->sec_per_clus);
first_cl = cluster;
sb_issue_discard(sb,
fat_clus_to_blknr(sbi, first_cl),
nr_clus * sbi->sec_per_clus);
first_cl = cluster;
}
}
ops->ent_put(&fatent, FAT_ENT_FREE);

8
fs/fat/inode.c
View File

@ -858,6 +858,8 @@ static int fat_show_options(struct seq_file *m, struct vfsmount *mnt)
seq_puts(m, ",errors=panic");
else
seq_puts(m, ",errors=remount-ro");
if (opts->discard)
seq_puts(m, ",discard");
return 0;
}
@ -871,7 +873,7 @@ enum {
Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_rodir, Opt_err_cont,
Opt_err_panic, Opt_err_ro, Opt_err,
Opt_err_panic, Opt_err_ro, Opt_discard, Opt_err,
};
static const match_table_t fat_tokens = {
@ -899,6 +901,7 @@ static const match_table_t fat_tokens = {
{Opt_err_cont, "errors=continue"},
{Opt_err_panic, "errors=panic"},
{Opt_err_ro, "errors=remount-ro"},
{Opt_discard, "discard"},
{Opt_obsolate, "conv=binary"},
{Opt_obsolate, "conv=text"},
{Opt_obsolate, "conv=auto"},
@ -1136,6 +1139,9 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
case Opt_rodir:
opts->rodir = 1;
break;
case Opt_discard:
opts->discard = 1;
break;
/* obsolete mount options */
case Opt_obsolate: