diff options
Diffstat (limited to 'drivers/staging/erofs/super.c')
| -rw-r--r-- | drivers/staging/erofs/super.c | 100 |
1 files changed, 69 insertions, 31 deletions
diff --git a/drivers/staging/erofs/super.c b/drivers/staging/erofs/super.c index 1aec509c805f..f69e619807a1 100644 --- a/drivers/staging/erofs/super.c +++ b/drivers/staging/erofs/super.c @@ -29,7 +29,7 @@ static void init_once(void *ptr) inode_init_once(&vi->vfs_inode); } -static int erofs_init_inode_cache(void) +static int __init erofs_init_inode_cache(void) { erofs_inode_cachep = kmem_cache_create("erofs_inode", sizeof(struct erofs_vnode), 0, @@ -81,7 +81,7 @@ static int superblock_read(struct super_block *sb) struct erofs_sb_info *sbi; struct buffer_head *bh; struct erofs_super_block *layout; - unsigned blkszbits; + unsigned int blkszbits; int ret; bh = sb_bread(sb, 0); @@ -116,9 +116,10 @@ static int superblock_read(struct super_block *sb) #endif sbi->islotbits = ffs(sizeof(struct erofs_inode_v1)) - 1; #ifdef CONFIG_EROFS_FS_ZIP - sbi->clusterbits = 12; + /* TODO: clusterbits should be related to inode */ + sbi->clusterbits = blkszbits; - if (1 << (sbi->clusterbits - 12) > Z_EROFS_CLUSTER_MAX_PAGES) + if (1 << (sbi->clusterbits - PAGE_SHIFT) > Z_EROFS_CLUSTER_MAX_PAGES) errln("clusterbits %u is not supported on this kernel", sbi->clusterbits); #endif @@ -144,8 +145,8 @@ char *erofs_fault_name[FAULT_MAX] = { [FAULT_KMALLOC] = "kmalloc", }; -static void erofs_build_fault_attr(struct erofs_sb_info *sbi, - unsigned int rate) +static void __erofs_build_fault_attr(struct erofs_sb_info *sbi, + unsigned int rate) { struct erofs_fault_info *ffi = &sbi->fault_info; @@ -156,11 +157,52 @@ static void erofs_build_fault_attr(struct erofs_sb_info *sbi, } else { memset(ffi, 0, sizeof(struct erofs_fault_info)); } + + set_opt(sbi, FAULT_INJECTION); +} + +static int erofs_build_fault_attr(struct erofs_sb_info *sbi, + substring_t *args) +{ + int rate = 0; + + if (args->from && match_int(args, &rate)) + return -EINVAL; + + __erofs_build_fault_attr(sbi, rate); + return 0; +} + +static unsigned int erofs_get_fault_rate(struct erofs_sb_info *sbi) +{ + return sbi->fault_info.inject_rate; +} +#else +static void __erofs_build_fault_attr(struct erofs_sb_info *sbi, + unsigned int rate) +{ +} + +static int erofs_build_fault_attr(struct erofs_sb_info *sbi, + substring_t *args) +{ + infoln("fault_injection options not supported"); + return 0; +} + +static unsigned int erofs_get_fault_rate(struct erofs_sb_info *sbi) +{ + return 0; } #endif static void default_options(struct erofs_sb_info *sbi) { + /* set up some FS parameters */ +#ifdef CONFIG_EROFS_FS_ZIP + sbi->max_sync_decompress_pages = DEFAULT_MAX_SYNC_DECOMPRESS_PAGES; +#endif + #ifdef CONFIG_EROFS_FS_XATTR set_opt(sbi, XATTR_USER); #endif @@ -192,7 +234,7 @@ static int parse_options(struct super_block *sb, char *options) { substring_t args[MAX_OPT_ARGS]; char *p; - int arg = 0; + int err; if (!options) return 0; @@ -238,15 +280,11 @@ static int parse_options(struct super_block *sb, char *options) break; #endif case Opt_fault_injection: - if (args->from && match_int(args, &arg)) - return -EINVAL; -#ifdef CONFIG_EROFS_FAULT_INJECTION - erofs_build_fault_attr(EROFS_SB(sb), arg); - set_opt(EROFS_SB(sb), FAULT_INJECTION); -#else - infoln("FAULT_INJECTION was not selected"); -#endif + err = erofs_build_fault_attr(EROFS_SB(sb), args); + if (err) + return err; break; + default: errln("Unrecognized mount option \"%s\" " "or missing value", p); @@ -340,7 +378,7 @@ static int erofs_read_super(struct super_block *sb, goto err_sbread; sb->s_magic = EROFS_SUPER_MAGIC; - sb->s_flags |= MS_RDONLY | MS_NOATIME; + sb->s_flags |= SB_RDONLY | SB_NOATIME; sb->s_maxbytes = MAX_LFS_FILESIZE; sb->s_time_gran = 1; @@ -521,11 +559,6 @@ static struct file_system_type erofs_fs_type = { }; MODULE_ALIAS_FS("erofs"); -#ifdef CONFIG_EROFS_FS_ZIP -extern int z_erofs_init_zip_subsystem(void); -extern void z_erofs_exit_zip_subsystem(void); -#endif - static int __init erofs_module_init(void) { int err; @@ -541,11 +574,9 @@ static int __init erofs_module_init(void) if (err) goto shrinker_err; -#ifdef CONFIG_EROFS_FS_ZIP err = z_erofs_init_zip_subsystem(); if (err) goto zip_err; -#endif err = register_filesystem(&erofs_fs_type); if (err) @@ -555,10 +586,8 @@ static int __init erofs_module_init(void) return 0; fs_err: -#ifdef CONFIG_EROFS_FS_ZIP z_erofs_exit_zip_subsystem(); zip_err: -#endif unregister_shrinker(&erofs_shrinker_info); shrinker_err: erofs_exit_inode_cache(); @@ -569,9 +598,7 @@ icache_err: static void __exit erofs_module_exit(void) { unregister_filesystem(&erofs_fs_type); -#ifdef CONFIG_EROFS_FS_ZIP z_erofs_exit_zip_subsystem(); -#endif unregister_shrinker(&erofs_shrinker_info); erofs_exit_inode_cache(); infoln("successfully finalize erofs"); @@ -615,20 +642,31 @@ static int erofs_show_options(struct seq_file *seq, struct dentry *root) else seq_puts(seq, ",noacl"); #endif -#ifdef CONFIG_EROFS_FAULT_INJECTION if (test_opt(sbi, FAULT_INJECTION)) seq_printf(seq, ",fault_injection=%u", - sbi->fault_info.inject_rate); -#endif + erofs_get_fault_rate(sbi)); return 0; } static int erofs_remount(struct super_block *sb, int *flags, char *data) { + struct erofs_sb_info *sbi = EROFS_SB(sb); + unsigned int org_mnt_opt = sbi->mount_opt; + unsigned int org_inject_rate = erofs_get_fault_rate(sbi); + int err; + BUG_ON(!sb_rdonly(sb)); + err = parse_options(sb, data); + if (err) + goto out; - *flags |= MS_RDONLY; + *flags |= SB_RDONLY; return 0; +out: + __erofs_build_fault_attr(sbi, org_inject_rate); + sbi->mount_opt = org_mnt_opt; + + return err; } const struct super_operations erofs_sops = { |