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Diffstat (limited to 'fs/ocfs2/super.c')
-rw-r--r--fs/ocfs2/super.c145
1 files changed, 89 insertions, 56 deletions
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 86b559c7dce9..c034b5129c1e 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -81,8 +81,16 @@ static struct dentry *ocfs2_debugfs_root = NULL;
MODULE_AUTHOR("Oracle");
MODULE_LICENSE("GPL");
+struct mount_options
+{
+ unsigned long mount_opt;
+ unsigned int atime_quantum;
+ signed short slot;
+};
+
static int ocfs2_parse_options(struct super_block *sb, char *options,
- unsigned long *mount_opt, int is_remount);
+ struct mount_options *mopt,
+ int is_remount);
static void ocfs2_put_super(struct super_block *sb);
static int ocfs2_mount_volume(struct super_block *sb);
static int ocfs2_remount(struct super_block *sb, int *flags, char *data);
@@ -114,8 +122,6 @@ static void ocfs2_write_super(struct super_block *sb);
static struct inode *ocfs2_alloc_inode(struct super_block *sb);
static void ocfs2_destroy_inode(struct inode *inode);
-static unsigned long long ocfs2_max_file_offset(unsigned int blockshift);
-
static const struct super_operations ocfs2_sops = {
.statfs = ocfs2_statfs,
.alloc_inode = ocfs2_alloc_inode,
@@ -140,6 +146,7 @@ enum {
Opt_data_ordered,
Opt_data_writeback,
Opt_atime_quantum,
+ Opt_slot,
Opt_err,
};
@@ -154,6 +161,7 @@ static match_table_t tokens = {
{Opt_data_ordered, "data=ordered"},
{Opt_data_writeback, "data=writeback"},
{Opt_atime_quantum, "atime_quantum=%u"},
+ {Opt_slot, "preferred_slot=%u"},
{Opt_err, NULL}
};
@@ -315,46 +323,58 @@ static void ocfs2_destroy_inode(struct inode *inode)
kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
}
-/* From xfs_super.c:xfs_max_file_offset
- * Copyright (c) 2000-2004 Silicon Graphics, Inc.
- */
-static unsigned long long ocfs2_max_file_offset(unsigned int blockshift)
+static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
+ unsigned int cbits)
{
- unsigned int pagefactor = 1;
- unsigned int bitshift = BITS_PER_LONG - 1;
-
- /* Figure out maximum filesize, on Linux this can depend on
- * the filesystem blocksize (on 32 bit platforms).
- * __block_prepare_write does this in an [unsigned] long...
- * page->index << (PAGE_CACHE_SHIFT - bbits)
- * So, for page sized blocks (4K on 32 bit platforms),
- * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
- * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
- * but for smaller blocksizes it is less (bbits = log2 bsize).
- * Note1: get_block_t takes a long (implicit cast from above)
- * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
- * can optionally convert the [unsigned] long from above into
- * an [unsigned] long long.
+ unsigned int bytes = 1 << cbits;
+ unsigned int trim = bytes;
+ unsigned int bitshift = 32;
+
+ /*
+ * i_size and all block offsets in ocfs2 are always 64 bits
+ * wide. i_clusters is 32 bits, in cluster-sized units. So on
+ * 64 bit platforms, cluster size will be the limiting factor.
*/
#if BITS_PER_LONG == 32
# if defined(CONFIG_LBD)
BUILD_BUG_ON(sizeof(sector_t) != 8);
- pagefactor = PAGE_CACHE_SIZE;
- bitshift = BITS_PER_LONG;
+ /*
+ * We might be limited by page cache size.
+ */
+ if (bytes > PAGE_CACHE_SIZE) {
+ bytes = PAGE_CACHE_SIZE;
+ trim = 1;
+ /*
+ * Shift by 31 here so that we don't get larger than
+ * MAX_LFS_FILESIZE
+ */
+ bitshift = 31;
+ }
# else
- pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift);
+ /*
+ * We are limited by the size of sector_t. Use block size, as
+ * that's what we expose to the VFS.
+ */
+ bytes = 1 << bbits;
+ trim = 1;
+ bitshift = 31;
# endif
#endif
- return (((unsigned long long)pagefactor) << bitshift) - 1;
+ /*
+ * Trim by a whole cluster when we can actually approach the
+ * on-disk limits. Otherwise we can overflow i_clusters when
+ * an extent start is at the max offset.
+ */
+ return (((unsigned long long)bytes) << bitshift) - trim;
}
static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
{
int incompat_features;
int ret = 0;
- unsigned long parsed_options;
+ struct mount_options parsed_options;
struct ocfs2_super *osb = OCFS2_SB(sb);
if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) {
@@ -363,14 +383,14 @@ static int ocfs2_remount(struct super_block *sb, int *flags, char *data)
}
if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) !=
- (parsed_options & OCFS2_MOUNT_HB_LOCAL)) {
+ (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL)) {
ret = -EINVAL;
mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n");
goto out;
}
if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) !=
- (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) {
+ (parsed_options.mount_opt & OCFS2_MOUNT_DATA_WRITEBACK)) {
ret = -EINVAL;
mlog(ML_ERROR, "Cannot change data mode on remount\n");
goto out;
@@ -421,7 +441,9 @@ unlock_osb:
/* Only save off the new mount options in case of a successful
* remount. */
- osb->s_mount_opt = parsed_options;
+ osb->s_mount_opt = parsed_options.mount_opt;
+ osb->s_atime_quantum = parsed_options.atime_quantum;
+ osb->preferred_slot = parsed_options.slot;
}
out:
return ret;
@@ -533,7 +555,7 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
{
struct dentry *root;
int status, sector_size;
- unsigned long parsed_opt;
+ struct mount_options parsed_options;
struct inode *inode = NULL;
struct ocfs2_super *osb = NULL;
struct buffer_head *bh = NULL;
@@ -541,14 +563,14 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
mlog_entry("%p, %p, %i", sb, data, silent);
- if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) {
+ if (!ocfs2_parse_options(sb, data, &parsed_options, 0)) {
status = -EINVAL;
goto read_super_error;
}
/* for now we only have one cluster/node, make sure we see it
* in the heartbeat universe */
- if (parsed_opt & OCFS2_MOUNT_HB_LOCAL) {
+ if (parsed_options.mount_opt & OCFS2_MOUNT_HB_LOCAL) {
if (!o2hb_check_local_node_heartbeating()) {
status = -EINVAL;
goto read_super_error;
@@ -570,7 +592,9 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
}
brelse(bh);
bh = NULL;
- osb->s_mount_opt = parsed_opt;
+ osb->s_mount_opt = parsed_options.mount_opt;
+ osb->s_atime_quantum = parsed_options.atime_quantum;
+ osb->preferred_slot = parsed_options.slot;
sb->s_magic = OCFS2_SUPER_MAGIC;
@@ -712,7 +736,7 @@ static struct file_system_type ocfs2_fs_type = {
static int ocfs2_parse_options(struct super_block *sb,
char *options,
- unsigned long *mount_opt,
+ struct mount_options *mopt,
int is_remount)
{
int status;
@@ -721,7 +745,9 @@ static int ocfs2_parse_options(struct super_block *sb,
mlog_entry("remount: %d, options: \"%s\"\n", is_remount,
options ? options : "(none)");
- *mount_opt = 0;
+ mopt->mount_opt = 0;
+ mopt->atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+ mopt->slot = OCFS2_INVALID_SLOT;
if (!options) {
status = 1;
@@ -731,7 +757,6 @@ static int ocfs2_parse_options(struct super_block *sb,
while ((p = strsep(&options, ",")) != NULL) {
int token, option;
substring_t args[MAX_OPT_ARGS];
- struct ocfs2_super * osb = OCFS2_SB(sb);
if (!*p)
continue;
@@ -739,10 +764,10 @@ static int ocfs2_parse_options(struct super_block *sb,
token = match_token(p, tokens, args);
switch (token) {
case Opt_hb_local:
- *mount_opt |= OCFS2_MOUNT_HB_LOCAL;
+ mopt->mount_opt |= OCFS2_MOUNT_HB_LOCAL;
break;
case Opt_hb_none:
- *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
+ mopt->mount_opt &= ~OCFS2_MOUNT_HB_LOCAL;
break;
case Opt_barrier:
if (match_int(&args[0], &option)) {
@@ -750,27 +775,27 @@ static int ocfs2_parse_options(struct super_block *sb,
goto bail;
}
if (option)
- *mount_opt |= OCFS2_MOUNT_BARRIER;
+ mopt->mount_opt |= OCFS2_MOUNT_BARRIER;
else
- *mount_opt &= ~OCFS2_MOUNT_BARRIER;
+ mopt->mount_opt &= ~OCFS2_MOUNT_BARRIER;
break;
case Opt_intr:
- *mount_opt &= ~OCFS2_MOUNT_NOINTR;
+ mopt->mount_opt &= ~OCFS2_MOUNT_NOINTR;
break;
case Opt_nointr:
- *mount_opt |= OCFS2_MOUNT_NOINTR;
+ mopt->mount_opt |= OCFS2_MOUNT_NOINTR;
break;
case Opt_err_panic:
- *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
+ mopt->mount_opt |= OCFS2_MOUNT_ERRORS_PANIC;
break;
case Opt_err_ro:
- *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
+ mopt->mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC;
break;
case Opt_data_ordered:
- *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
+ mopt->mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK;
break;
case Opt_data_writeback:
- *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
+ mopt->mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK;
break;
case Opt_atime_quantum:
if (match_int(&args[0], &option)) {
@@ -778,9 +803,16 @@ static int ocfs2_parse_options(struct super_block *sb,
goto bail;
}
if (option >= 0)
- osb->s_atime_quantum = option;
- else
- osb->s_atime_quantum = OCFS2_DEFAULT_ATIME_QUANTUM;
+ mopt->atime_quantum = option;
+ break;
+ case Opt_slot:
+ option = 0;
+ if (match_int(&args[0], &option)) {
+ status = 0;
+ goto bail;
+ }
+ if (option)
+ mopt->slot = (s16)option;
break;
default:
mlog(ML_ERROR,
@@ -969,7 +1001,7 @@ static int ocfs2_initialize_mem_caches(void)
0,
(SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
- ocfs2_inode_init_once, NULL);
+ ocfs2_inode_init_once);
if (!ocfs2_inode_cachep)
return -ENOMEM;
@@ -1244,8 +1276,8 @@ static int ocfs2_initialize_super(struct super_block *sb,
int sector_size)
{
int status = 0;
- int i;
- struct ocfs2_dinode *di = NULL;
+ int i, cbits, bbits;
+ struct ocfs2_dinode *di = (struct ocfs2_dinode *)bh->b_data;
struct inode *inode = NULL;
struct buffer_head *bitmap_bh = NULL;
struct ocfs2_journal *journal;
@@ -1264,9 +1296,12 @@ static int ocfs2_initialize_super(struct super_block *sb,
sb->s_fs_info = osb;
sb->s_op = &ocfs2_sops;
sb->s_export_op = &ocfs2_export_ops;
+ sb->s_time_gran = 1;
sb->s_flags |= MS_NOATIME;
/* this is needed to support O_LARGEFILE */
- sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits);
+ cbits = le32_to_cpu(di->id2.i_super.s_clustersize_bits);
+ bbits = le32_to_cpu(di->id2.i_super.s_blocksize_bits);
+ sb->s_maxbytes = ocfs2_max_file_offset(bbits, cbits);
osb->sb = sb;
/* Save off for ocfs2_rw_direct */
@@ -1326,8 +1361,6 @@ static int ocfs2_initialize_super(struct super_block *sb,
goto bail;
}
- di = (struct ocfs2_dinode *)bh->b_data;
-
osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots);
if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) {
mlog(ML_ERROR, "Invalid number of node slots (%u)\n",
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 11:37:30 +0000