X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=fs%2Fext2%2Fsuper.c;h=42e4a303b6758628aa87c23d18acbcb6e13110c5;hb=3bd0946eb157e26240ca858d1a42738b095dc6f3;hp=8d6819846fc97241375542c7316d2d9cd6a0b26e;hpb=1b1dcc1b57a49136f118a0f16367256ff9994a69;p=safe%2Fjmp%2Flinux-2.6 diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 8d68198..42e4a30 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -16,7 +16,6 @@ * David S. Miller (davem@caip.rutgers.edu), 1995 */ -#include #include #include #include @@ -26,10 +25,13 @@ #include #include #include +#include #include #include #include #include +#include +#include #include #include "ext2.h" #include "xattr.h" @@ -39,7 +41,8 @@ static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es); static int ext2_remount (struct super_block * sb, int * flags, char * data); -static int ext2_statfs (struct super_block * sb, struct kstatfs * buf); +static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf); +static int ext2_sync_fs(struct super_block *sb, int wait); void ext2_error (struct super_block * sb, const char * function, const char * fmt, ...) @@ -50,33 +53,32 @@ void ext2_error (struct super_block * sb, const char * function, if (!(sb->s_flags & MS_RDONLY)) { sbi->s_mount_state |= EXT2_ERROR_FS; - es->s_state = - cpu_to_le16(le16_to_cpu(es->s_state) | EXT2_ERROR_FS); + es->s_state |= cpu_to_le16(EXT2_ERROR_FS); ext2_sync_super(sb, es); } va_start(args, fmt); - printk(KERN_CRIT "EXT2-fs error (device %s): %s: ",sb->s_id, function); + printk(KERN_CRIT "EXT2-fs (%s): error: %s: ", sb->s_id, function); vprintk(fmt, args); printk("\n"); va_end(args); if (test_opt(sb, ERRORS_PANIC)) - panic("EXT2-fs panic from previous error\n"); + panic("EXT2-fs: panic from previous error\n"); if (test_opt(sb, ERRORS_RO)) { - printk("Remounting filesystem read-only\n"); + ext2_msg(sb, KERN_CRIT, + "error: remounting filesystem read-only"); sb->s_flags |= MS_RDONLY; } } -void ext2_warning (struct super_block * sb, const char * function, - const char * fmt, ...) +void ext2_msg(struct super_block *sb, const char *prefix, + const char *fmt, ...) { va_list args; va_start(args, fmt); - printk(KERN_WARNING "EXT2-fs warning (device %s): %s: ", - sb->s_id, function); + printk("%sEXT2-fs (%s): ", prefix, sb->s_id); vprintk(fmt, args); printk("\n"); va_end(args); @@ -89,9 +91,9 @@ void ext2_update_dynamic_rev(struct super_block *sb) if (le32_to_cpu(es->s_rev_level) > EXT2_GOOD_OLD_REV) return; - ext2_warning(sb, __FUNCTION__, - "updating to rev %d because of new feature flag, " - "running e2fsck is recommended", + ext2_msg(sb, KERN_WARNING, + "warning: updating to rev %d because of " + "new feature flag, running e2fsck is recommended", EXT2_DYNAMIC_REV); es->s_first_ino = cpu_to_le32(EXT2_GOOD_OLD_FIRST_INO); @@ -113,6 +115,11 @@ static void ext2_put_super (struct super_block * sb) int i; struct ext2_sb_info *sbi = EXT2_SB(sb); + lock_kernel(); + + if (sb->s_dirt) + ext2_write_super(sb); + ext2_xattr_put_super(sb); if (!(sb->s_flags & MS_RDONLY)) { struct ext2_super_block *es = sbi->s_es; @@ -131,23 +138,21 @@ static void ext2_put_super (struct super_block * sb) percpu_counter_destroy(&sbi->s_dirs_counter); brelse (sbi->s_sbh); sb->s_fs_info = NULL; + kfree(sbi->s_blockgroup_lock); kfree(sbi); - return; + unlock_kernel(); } -static kmem_cache_t * ext2_inode_cachep; +static struct kmem_cache * ext2_inode_cachep; static struct inode *ext2_alloc_inode(struct super_block *sb) { struct ext2_inode_info *ei; - ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep, SLAB_KERNEL); + ei = (struct ext2_inode_info *)kmem_cache_alloc(ext2_inode_cachep, GFP_KERNEL); if (!ei) return NULL; -#ifdef CONFIG_EXT2_FS_POSIX_ACL - ei->i_acl = EXT2_ACL_NOT_CACHED; - ei->i_default_acl = EXT2_ACL_NOT_CACHED; -#endif + ei->i_block_alloc_info = NULL; ei->vfs_inode.i_version = 1; return &ei->vfs_inode; } @@ -157,26 +162,25 @@ static void ext2_destroy_inode(struct inode *inode) kmem_cache_free(ext2_inode_cachep, EXT2_I(inode)); } -static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) +static void init_once(void *foo) { struct ext2_inode_info *ei = (struct ext2_inode_info *) foo; - if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == - SLAB_CTOR_CONSTRUCTOR) { - rwlock_init(&ei->i_meta_lock); + rwlock_init(&ei->i_meta_lock); #ifdef CONFIG_EXT2_FS_XATTR - init_rwsem(&ei->xattr_sem); + init_rwsem(&ei->xattr_sem); #endif - inode_init_once(&ei->vfs_inode); - } + mutex_init(&ei->truncate_mutex); + inode_init_once(&ei->vfs_inode); } - + static int init_inodecache(void) { ext2_inode_cachep = kmem_cache_create("ext2_inode_cache", sizeof(struct ext2_inode_info), - 0, SLAB_RECLAIM_ACCOUNT, - init_once, NULL); + 0, (SLAB_RECLAIM_ACCOUNT| + SLAB_MEM_SPREAD), + init_once); if (ext2_inode_cachep == NULL) return -ENOMEM; return 0; @@ -184,34 +188,82 @@ static int init_inodecache(void) static void destroy_inodecache(void) { - if (kmem_cache_destroy(ext2_inode_cachep)) - printk(KERN_INFO "ext2_inode_cache: not all structures were freed\n"); + kmem_cache_destroy(ext2_inode_cachep); } static void ext2_clear_inode(struct inode *inode) { -#ifdef CONFIG_EXT2_FS_POSIX_ACL - struct ext2_inode_info *ei = EXT2_I(inode); + struct ext2_block_alloc_info *rsv = EXT2_I(inode)->i_block_alloc_info; - if (ei->i_acl && ei->i_acl != EXT2_ACL_NOT_CACHED) { - posix_acl_release(ei->i_acl); - ei->i_acl = EXT2_ACL_NOT_CACHED; - } - if (ei->i_default_acl && ei->i_default_acl != EXT2_ACL_NOT_CACHED) { - posix_acl_release(ei->i_default_acl); - ei->i_default_acl = EXT2_ACL_NOT_CACHED; - } -#endif + dquot_drop(inode); + ext2_discard_reservation(inode); + EXT2_I(inode)->i_block_alloc_info = NULL; + if (unlikely(rsv)) + kfree(rsv); } static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs) { - struct ext2_sb_info *sbi = EXT2_SB(vfs->mnt_sb); + struct super_block *sb = vfs->mnt_sb; + struct ext2_sb_info *sbi = EXT2_SB(sb); + struct ext2_super_block *es = sbi->s_es; + unsigned long def_mount_opts; + + def_mount_opts = le32_to_cpu(es->s_default_mount_opts); - if (sbi->s_mount_opt & EXT2_MOUNT_GRPID) + if (sbi->s_sb_block != 1) + seq_printf(seq, ",sb=%lu", sbi->s_sb_block); + if (test_opt(sb, MINIX_DF)) + seq_puts(seq, ",minixdf"); + if (test_opt(sb, GRPID)) seq_puts(seq, ",grpid"); - else + if (!test_opt(sb, GRPID) && (def_mount_opts & EXT2_DEFM_BSDGROUPS)) seq_puts(seq, ",nogrpid"); + if (sbi->s_resuid != EXT2_DEF_RESUID || + le16_to_cpu(es->s_def_resuid) != EXT2_DEF_RESUID) { + seq_printf(seq, ",resuid=%u", sbi->s_resuid); + } + if (sbi->s_resgid != EXT2_DEF_RESGID || + le16_to_cpu(es->s_def_resgid) != EXT2_DEF_RESGID) { + seq_printf(seq, ",resgid=%u", sbi->s_resgid); + } + if (test_opt(sb, ERRORS_RO)) { + int def_errors = le16_to_cpu(es->s_errors); + + if (def_errors == EXT2_ERRORS_PANIC || + def_errors == EXT2_ERRORS_CONTINUE) { + seq_puts(seq, ",errors=remount-ro"); + } + } + if (test_opt(sb, ERRORS_CONT)) + seq_puts(seq, ",errors=continue"); + if (test_opt(sb, ERRORS_PANIC)) + seq_puts(seq, ",errors=panic"); + if (test_opt(sb, NO_UID32)) + seq_puts(seq, ",nouid32"); + if (test_opt(sb, DEBUG)) + seq_puts(seq, ",debug"); + if (test_opt(sb, OLDALLOC)) + seq_puts(seq, ",oldalloc"); + +#ifdef CONFIG_EXT2_FS_XATTR + if (test_opt(sb, XATTR_USER)) + seq_puts(seq, ",user_xattr"); + if (!test_opt(sb, XATTR_USER) && + (def_mount_opts & EXT2_DEFM_XATTR_USER)) { + seq_puts(seq, ",nouser_xattr"); + } +#endif + +#ifdef CONFIG_EXT2_FS_POSIX_ACL + if (test_opt(sb, POSIX_ACL)) + seq_puts(seq, ",acl"); + if (!test_opt(sb, POSIX_ACL) && (def_mount_opts & EXT2_DEFM_ACL)) + seq_puts(seq, ",noacl"); +#endif + + if (test_opt(sb, NOBH)) + seq_puts(seq, ",nobh"); #if defined(CONFIG_QUOTA) if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA) @@ -221,6 +273,14 @@ static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs) seq_puts(seq, ",grpquota"); #endif +#if defined(CONFIG_EXT2_FS_XIP) + if (sbi->s_mount_opt & EXT2_MOUNT_XIP) + seq_puts(seq, ",xip"); +#endif + + if (!test_opt(sb, RESERVATION)) + seq_puts(seq, ",noreservation"); + return 0; } @@ -229,15 +289,14 @@ static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, siz static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); #endif -static struct super_operations ext2_sops = { +static const struct super_operations ext2_sops = { .alloc_inode = ext2_alloc_inode, .destroy_inode = ext2_destroy_inode, - .read_inode = ext2_read_inode, .write_inode = ext2_write_inode, - .put_inode = ext2_put_inode, .delete_inode = ext2_delete_inode, .put_super = ext2_put_super, .write_super = ext2_write_super, + .sync_fs = ext2_sync_fs, .statfs = ext2_statfs, .remount_fs = ext2_remount, .clear_inode = ext2_clear_inode, @@ -248,13 +307,54 @@ static struct super_operations ext2_sops = { #endif }; +static struct inode *ext2_nfs_get_inode(struct super_block *sb, + u64 ino, u32 generation) +{ + struct inode *inode; + + if (ino < EXT2_FIRST_INO(sb) && ino != EXT2_ROOT_INO) + return ERR_PTR(-ESTALE); + if (ino > le32_to_cpu(EXT2_SB(sb)->s_es->s_inodes_count)) + return ERR_PTR(-ESTALE); + + /* iget isn't really right if the inode is currently unallocated!! + * ext2_read_inode currently does appropriate checks, but + * it might be "neater" to call ext2_get_inode first and check + * if the inode is valid..... + */ + inode = ext2_iget(sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (generation && inode->i_generation != generation) { + /* we didn't find the right inode.. */ + iput(inode); + return ERR_PTR(-ESTALE); + } + return inode; +} + +static struct dentry *ext2_fh_to_dentry(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, + ext2_nfs_get_inode); +} + +static struct dentry *ext2_fh_to_parent(struct super_block *sb, struct fid *fid, + int fh_len, int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, + ext2_nfs_get_inode); +} + /* Yes, most of these are left as NULL!! * A NULL value implies the default, which works with ext2-like file * systems, but can be improved upon. * Currently only get_parent is required. */ -struct dentry *ext2_get_parent(struct dentry *child); -static struct export_operations ext2_export_ops = { +static const struct export_operations ext2_export_ops = { + .fh_to_dentry = ext2_fh_to_dentry, + .fh_to_parent = ext2_fh_to_parent, .get_parent = ext2_get_parent, }; @@ -284,10 +384,10 @@ enum { Opt_err_ro, Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov, Opt_nobh, Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, Opt_xip, Opt_ignore, Opt_err, Opt_quota, - Opt_usrquota, Opt_grpquota + Opt_usrquota, Opt_grpquota, Opt_reservation, Opt_noreservation }; -static match_table_t tokens = { +static const match_table_t tokens = { {Opt_bsd_df, "bsddf"}, {Opt_minix_df, "minixdf"}, {Opt_grpid, "grpid"}, @@ -316,15 +416,16 @@ static match_table_t tokens = { {Opt_ignore, "noquota"}, {Opt_quota, "quota"}, {Opt_usrquota, "usrquota"}, + {Opt_reservation, "reservation"}, + {Opt_noreservation, "noreservation"}, {Opt_err, NULL} }; -static int parse_options (char * options, - struct ext2_sb_info *sbi) +static int parse_options(char *options, struct super_block *sb) { - char * p; + char *p; + struct ext2_sb_info *sbi = EXT2_SB(sb); substring_t args[MAX_OPT_ARGS]; - unsigned long kind = EXT2_MOUNT_ERRORS_CONT; int option; if (!options) @@ -364,13 +465,19 @@ static int parse_options (char * options, /* *sb_block = match_int(&args[0]); */ break; case Opt_err_panic: - kind = EXT2_MOUNT_ERRORS_PANIC; + clear_opt (sbi->s_mount_opt, ERRORS_CONT); + clear_opt (sbi->s_mount_opt, ERRORS_RO); + set_opt (sbi->s_mount_opt, ERRORS_PANIC); break; case Opt_err_ro: - kind = EXT2_MOUNT_ERRORS_RO; + clear_opt (sbi->s_mount_opt, ERRORS_CONT); + clear_opt (sbi->s_mount_opt, ERRORS_PANIC); + set_opt (sbi->s_mount_opt, ERRORS_RO); break; case Opt_err_cont: - kind = EXT2_MOUNT_ERRORS_CONT; + clear_opt (sbi->s_mount_opt, ERRORS_RO); + clear_opt (sbi->s_mount_opt, ERRORS_PANIC); + set_opt (sbi->s_mount_opt, ERRORS_CONT); break; case Opt_nouid32: set_opt (sbi->s_mount_opt, NO_UID32); @@ -400,7 +507,8 @@ static int parse_options (char * options, #else case Opt_user_xattr: case Opt_nouser_xattr: - printk("EXT2 (no)user_xattr options not supported\n"); + ext2_msg(sb, KERN_INFO, "(no)user_xattr options" + "not supported"); break; #endif #ifdef CONFIG_EXT2_FS_POSIX_ACL @@ -413,14 +521,15 @@ static int parse_options (char * options, #else case Opt_acl: case Opt_noacl: - printk("EXT2 (no)acl options not supported\n"); + ext2_msg(sb, KERN_INFO, + "(no)acl options not supported"); break; #endif case Opt_xip: #ifdef CONFIG_EXT2_FS_XIP set_opt (sbi->s_mount_opt, XIP); #else - printk("EXT2 xip option not supported\n"); + ext2_msg(sb, KERN_INFO, "xip option not supported"); #endif break; @@ -437,19 +546,25 @@ static int parse_options (char * options, case Opt_quota: case Opt_usrquota: case Opt_grpquota: - printk(KERN_ERR - "EXT2-fs: quota operations not supported.\n"); - + ext2_msg(sb, KERN_INFO, + "quota operations not supported"); break; #endif + case Opt_reservation: + set_opt(sbi->s_mount_opt, RESERVATION); + ext2_msg(sb, KERN_INFO, "reservations ON"); + break; + case Opt_noreservation: + clear_opt(sbi->s_mount_opt, RESERVATION); + ext2_msg(sb, KERN_INFO, "reservations OFF"); + break; case Opt_ignore: break; default: return 0; } } - sbi->s_mount_opt |= kind; return 1; } @@ -461,34 +576,40 @@ static int ext2_setup_super (struct super_block * sb, struct ext2_sb_info *sbi = EXT2_SB(sb); if (le32_to_cpu(es->s_rev_level) > EXT2_MAX_SUPP_REV) { - printk ("EXT2-fs warning: revision level too high, " - "forcing read-only mode\n"); + ext2_msg(sb, KERN_ERR, + "error: revision level too high, " + "forcing read-only mode"); res = MS_RDONLY; } if (read_only) return res; if (!(sbi->s_mount_state & EXT2_VALID_FS)) - printk ("EXT2-fs warning: mounting unchecked fs, " - "running e2fsck is recommended\n"); + ext2_msg(sb, KERN_WARNING, + "warning: mounting unchecked fs, " + "running e2fsck is recommended"); else if ((sbi->s_mount_state & EXT2_ERROR_FS)) - printk ("EXT2-fs warning: mounting fs with errors, " - "running e2fsck is recommended\n"); + ext2_msg(sb, KERN_WARNING, + "warning: mounting fs with errors, " + "running e2fsck is recommended"); else if ((__s16) le16_to_cpu(es->s_max_mnt_count) >= 0 && le16_to_cpu(es->s_mnt_count) >= (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) - printk ("EXT2-fs warning: maximal mount count reached, " - "running e2fsck is recommended\n"); + ext2_msg(sb, KERN_WARNING, + "warning: maximal mount count reached, " + "running e2fsck is recommended"); else if (le32_to_cpu(es->s_checkinterval) && - (le32_to_cpu(es->s_lastcheck) + le32_to_cpu(es->s_checkinterval) <= get_seconds())) - printk ("EXT2-fs warning: checktime reached, " - "running e2fsck is recommended\n"); + (le32_to_cpu(es->s_lastcheck) + + le32_to_cpu(es->s_checkinterval) <= get_seconds())) + ext2_msg(sb, KERN_WARNING, + "warning: checktime reached, " + "running e2fsck is recommended"); if (!le16_to_cpu(es->s_max_mnt_count)) es->s_max_mnt_count = cpu_to_le16(EXT2_DFL_MAX_MNT_COUNT); - es->s_mnt_count=cpu_to_le16(le16_to_cpu(es->s_mnt_count) + 1); + le16_add_cpu(&es->s_mnt_count, 1); ext2_write_super(sb); if (test_opt (sb, DEBUG)) - printk ("[EXT II FS %s, %s, bs=%lu, fs=%lu, gc=%lu, " - "bpg=%lu, ipg=%lu, mo=%04lx]\n", + ext2_msg(sb, KERN_INFO, "%s, %s, bs=%lu, fs=%lu, gc=%lu, " + "bpg=%lu, ipg=%lu, mo=%04lx]", EXT2FS_VERSION, EXT2FS_DATE, sb->s_blocksize, sbi->s_frag_size, sbi->s_groups_count, @@ -498,22 +619,26 @@ static int ext2_setup_super (struct super_block * sb, return res; } -static int ext2_check_descriptors (struct super_block * sb) +static int ext2_check_descriptors(struct super_block *sb) { int i; - int desc_block = 0; struct ext2_sb_info *sbi = EXT2_SB(sb); - unsigned long block = le32_to_cpu(sbi->s_es->s_first_data_block); - struct ext2_group_desc * gdp = NULL; ext2_debug ("Checking group descriptors"); - for (i = 0; i < sbi->s_groups_count; i++) - { - if ((i % EXT2_DESC_PER_BLOCK(sb)) == 0) - gdp = (struct ext2_group_desc *) sbi->s_group_desc[desc_block++]->b_data; - if (le32_to_cpu(gdp->bg_block_bitmap) < block || - le32_to_cpu(gdp->bg_block_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb)) + for (i = 0; i < sbi->s_groups_count; i++) { + struct ext2_group_desc *gdp = ext2_get_group_desc(sb, i, NULL); + ext2_fsblk_t first_block = ext2_group_first_block_no(sb, i); + ext2_fsblk_t last_block; + + if (i == sbi->s_groups_count - 1) + last_block = le32_to_cpu(sbi->s_es->s_blocks_count) - 1; + else + last_block = first_block + + (EXT2_BLOCKS_PER_GROUP(sb) - 1); + + if (le32_to_cpu(gdp->bg_block_bitmap) < first_block || + le32_to_cpu(gdp->bg_block_bitmap) > last_block) { ext2_error (sb, "ext2_check_descriptors", "Block bitmap for group %d" @@ -521,8 +646,8 @@ static int ext2_check_descriptors (struct super_block * sb) i, (unsigned long) le32_to_cpu(gdp->bg_block_bitmap)); return 0; } - if (le32_to_cpu(gdp->bg_inode_bitmap) < block || - le32_to_cpu(gdp->bg_inode_bitmap) >= block + EXT2_BLOCKS_PER_GROUP(sb)) + if (le32_to_cpu(gdp->bg_inode_bitmap) < first_block || + le32_to_cpu(gdp->bg_inode_bitmap) > last_block) { ext2_error (sb, "ext2_check_descriptors", "Inode bitmap for group %d" @@ -530,9 +655,9 @@ static int ext2_check_descriptors (struct super_block * sb) i, (unsigned long) le32_to_cpu(gdp->bg_inode_bitmap)); return 0; } - if (le32_to_cpu(gdp->bg_inode_table) < block || - le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group >= - block + EXT2_BLOCKS_PER_GROUP(sb)) + if (le32_to_cpu(gdp->bg_inode_table) < first_block || + le32_to_cpu(gdp->bg_inode_table) + sbi->s_itb_per_group - 1 > + last_block) { ext2_error (sb, "ext2_check_descriptors", "Inode table for group %d" @@ -540,14 +665,10 @@ static int ext2_check_descriptors (struct super_block * sb) i, (unsigned long) le32_to_cpu(gdp->bg_inode_table)); return 0; } - block += EXT2_BLOCKS_PER_GROUP(sb); - gdp++; } return 1; } -#define log2(n) ffz(~(n)) - /* * Maximal file size. There is a direct, and {,double-,triple-}indirect * block limit, and also a limit of (2^32 - 1) 512-byte sectors in i_blocks. @@ -556,11 +677,31 @@ static int ext2_check_descriptors (struct super_block * sb) static loff_t ext2_max_size(int bits) { loff_t res = EXT2_NDIR_BLOCKS; - /* This constant is calculated to be the largest file size for a - * dense, 4k-blocksize file such that the total number of + int meta_blocks; + loff_t upper_limit; + + /* This is calculated to be the largest file size for a + * dense, file such that the total number of * sectors in the file, including data and all indirect blocks, - * does not exceed 2^32. */ - const loff_t upper_limit = 0x1ff7fffd000LL; + * does not exceed 2^32 -1 + * __u32 i_blocks representing the total number of + * 512 bytes blocks of the file + */ + upper_limit = (1LL << 32) - 1; + + /* total blocks in file system block size */ + upper_limit >>= (bits - 9); + + + /* indirect blocks */ + meta_blocks = 1; + /* double indirect blocks */ + meta_blocks += 1 + (1LL << (bits-2)); + /* tripple indirect blocks */ + meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); + + upper_limit -= meta_blocks; + upper_limit <<= bits; res += 1LL << (bits-2); res += 1LL << (2*(bits-2)); @@ -568,6 +709,10 @@ static loff_t ext2_max_size(int bits) res <<= bits; if (res > upper_limit) res = upper_limit; + + if (res > MAX_LFS_FILESIZE) + res = MAX_LFS_FILESIZE; + return res; } @@ -576,10 +721,9 @@ static unsigned long descriptor_loc(struct super_block *sb, int nr) { struct ext2_sb_info *sbi = EXT2_SB(sb); - unsigned long bg, first_data_block, first_meta_bg; + unsigned long bg, first_meta_bg; int has_super = 0; - first_data_block = le32_to_cpu(sbi->s_es->s_first_data_block); first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); if (!EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_META_BG) || @@ -588,7 +732,8 @@ static unsigned long descriptor_loc(struct super_block *sb, bg = sbi->s_desc_per_block * nr; if (ext2_bg_has_super(sb, bg)) has_super = 1; - return (first_data_block + has_super + (bg * sbi->s_blocks_per_group)); + + return ext2_group_first_block_no(sb, bg) + has_super; } static int ext2_fill_super(struct super_block *sb, void *data, int silent) @@ -602,16 +747,25 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) unsigned long logic_sb_block; unsigned long offset = 0; unsigned long def_mount_opts; + long ret = -EINVAL; int blocksize = BLOCK_SIZE; int db_count; int i, j; __le32 features; + int err; - sbi = kmalloc(sizeof(*sbi), GFP_KERNEL); + sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; + + sbi->s_blockgroup_lock = + kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); + if (!sbi->s_blockgroup_lock) { + kfree(sbi); + return -ENOMEM; + } sb->s_fs_info = sbi; - memset(sbi, 0, sizeof(*sbi)); + sbi->s_sb_block = sb_block; /* * See what the current blocksize for the device is, and @@ -622,7 +776,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) */ blocksize = sb_min_blocksize(sb, BLOCK_SIZE); if (!blocksize) { - printk ("EXT2-fs: unable to set blocksize\n"); + ext2_msg(sb, KERN_ERR, "error: unable to set blocksize"); goto failed_sbi; } @@ -638,7 +792,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) } if (!(bh = sb_bread(sb, logic_sb_block))) { - printk ("EXT2-fs: unable to read superblock\n"); + ext2_msg(sb, KERN_ERR, "error: unable to read superblock"); goto failed_sbi; } /* @@ -660,20 +814,28 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) set_opt(sbi->s_mount_opt, GRPID); if (def_mount_opts & EXT2_DEFM_UID16) set_opt(sbi->s_mount_opt, NO_UID32); +#ifdef CONFIG_EXT2_FS_XATTR if (def_mount_opts & EXT2_DEFM_XATTR_USER) set_opt(sbi->s_mount_opt, XATTR_USER); +#endif +#ifdef CONFIG_EXT2_FS_POSIX_ACL if (def_mount_opts & EXT2_DEFM_ACL) set_opt(sbi->s_mount_opt, POSIX_ACL); +#endif if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_PANIC) set_opt(sbi->s_mount_opt, ERRORS_PANIC); - else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_RO) + else if (le16_to_cpu(sbi->s_es->s_errors) == EXT2_ERRORS_CONTINUE) + set_opt(sbi->s_mount_opt, ERRORS_CONT); + else set_opt(sbi->s_mount_opt, ERRORS_RO); sbi->s_resuid = le16_to_cpu(es->s_def_resuid); sbi->s_resgid = le16_to_cpu(es->s_def_resgid); - if (!parse_options ((char *) data, sbi)) + set_opt(sbi->s_mount_opt, RESERVATION); + + if (!parse_options((char *) data, sb)) goto failed_mount; sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | @@ -687,8 +849,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) (EXT2_HAS_COMPAT_FEATURE(sb, ~0U) || EXT2_HAS_RO_COMPAT_FEATURE(sb, ~0U) || EXT2_HAS_INCOMPAT_FEATURE(sb, ~0U))) - printk("EXT2-fs warning: feature flags set on rev 0 fs, " - "running e2fsck is recommended\n"); + ext2_msg(sb, KERN_WARNING, + "warning: feature flags set on rev 0 fs, " + "running e2fsck is recommended"); /* * Check feature flags regardless of the revision level, since we * previously didn't change the revision level when setting the flags, @@ -696,25 +859,25 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) */ features = EXT2_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP); if (features) { - printk("EXT2-fs: %s: couldn't mount because of " - "unsupported optional features (%x).\n", - sb->s_id, le32_to_cpu(features)); + ext2_msg(sb, KERN_ERR, "error: couldn't mount because of " + "unsupported optional features (%x)", + le32_to_cpu(features)); goto failed_mount; } if (!(sb->s_flags & MS_RDONLY) && (features = EXT2_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP))){ - printk("EXT2-fs: %s: couldn't mount RDWR because of " - "unsupported optional features (%x).\n", - sb->s_id, le32_to_cpu(features)); + ext2_msg(sb, KERN_ERR, "error: couldn't mount RDWR because of " + "unsupported optional features (%x)", + le32_to_cpu(features)); goto failed_mount; } blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); - if ((ext2_use_xip(sb)) && ((blocksize != PAGE_SIZE) || - (sb->s_blocksize != blocksize))) { + if (ext2_use_xip(sb) && blocksize != PAGE_SIZE) { if (!silent) - printk("XIP: Unsupported blocksize\n"); + ext2_msg(sb, KERN_ERR, + "error: unsupported blocksize for xip"); goto failed_mount; } @@ -723,7 +886,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) brelse(bh); if (!sb_set_blocksize(sb, blocksize)) { - printk(KERN_ERR "EXT2-fs: blocksize too small for device.\n"); + ext2_msg(sb, KERN_ERR, "error: blocksize is too small"); goto failed_sbi; } @@ -731,14 +894,14 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) offset = (sb_block*BLOCK_SIZE) % blocksize; bh = sb_bread(sb, logic_sb_block); if(!bh) { - printk("EXT2-fs: Couldn't read superblock on " - "2nd try.\n"); + ext2_msg(sb, KERN_ERR, "error: couldn't read" + "superblock on 2nd try"); goto failed_sbi; } es = (struct ext2_super_block *) (((char *)bh->b_data) + offset); sbi->s_es = es; if (es->s_magic != cpu_to_le16(EXT2_SUPER_MAGIC)) { - printk ("EXT2-fs: Magic mismatch, very weird !\n"); + ext2_msg(sb, KERN_ERR, "error: magic mismatch"); goto failed_mount; } } @@ -752,9 +915,10 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) sbi->s_inode_size = le16_to_cpu(es->s_inode_size); sbi->s_first_ino = le32_to_cpu(es->s_first_ino); if ((sbi->s_inode_size < EXT2_GOOD_OLD_INODE_SIZE) || - (sbi->s_inode_size & (sbi->s_inode_size - 1)) || + !is_power_of_2(sbi->s_inode_size) || (sbi->s_inode_size > blocksize)) { - printk ("EXT2-fs: unsupported inode size: %d\n", + ext2_msg(sb, KERN_ERR, + "error: unsupported inode size: %d", sbi->s_inode_size); goto failed_mount; } @@ -773,7 +937,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) if (EXT2_INODE_SIZE(sb) == 0) goto cantfind_ext2; sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb); - if (sbi->s_inodes_per_block == 0) + if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0) goto cantfind_ext2; sbi->s_itb_per_group = sbi->s_inodes_per_group / sbi->s_inodes_per_block; @@ -782,121 +946,152 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) sbi->s_sbh = bh; sbi->s_mount_state = le16_to_cpu(es->s_state); sbi->s_addr_per_block_bits = - log2 (EXT2_ADDR_PER_BLOCK(sb)); + ilog2 (EXT2_ADDR_PER_BLOCK(sb)); sbi->s_desc_per_block_bits = - log2 (EXT2_DESC_PER_BLOCK(sb)); + ilog2 (EXT2_DESC_PER_BLOCK(sb)); if (sb->s_magic != EXT2_SUPER_MAGIC) goto cantfind_ext2; if (sb->s_blocksize != bh->b_size) { if (!silent) - printk ("VFS: Unsupported blocksize on dev " - "%s.\n", sb->s_id); + ext2_msg(sb, KERN_ERR, "error: unsupported blocksize"); goto failed_mount; } if (sb->s_blocksize != sbi->s_frag_size) { - printk ("EXT2-fs: fragsize %lu != blocksize %lu (not supported yet)\n", + ext2_msg(sb, KERN_ERR, + "error: fragsize %lu != blocksize %lu" + "(not supported yet)", sbi->s_frag_size, sb->s_blocksize); goto failed_mount; } if (sbi->s_blocks_per_group > sb->s_blocksize * 8) { - printk ("EXT2-fs: #blocks per group too big: %lu\n", + ext2_msg(sb, KERN_ERR, + "error: #blocks per group too big: %lu", sbi->s_blocks_per_group); goto failed_mount; } if (sbi->s_frags_per_group > sb->s_blocksize * 8) { - printk ("EXT2-fs: #fragments per group too big: %lu\n", + ext2_msg(sb, KERN_ERR, + "error: #fragments per group too big: %lu", sbi->s_frags_per_group); goto failed_mount; } if (sbi->s_inodes_per_group > sb->s_blocksize * 8) { - printk ("EXT2-fs: #inodes per group too big: %lu\n", + ext2_msg(sb, KERN_ERR, + "error: #inodes per group too big: %lu", sbi->s_inodes_per_group); goto failed_mount; } if (EXT2_BLOCKS_PER_GROUP(sb) == 0) goto cantfind_ext2; - sbi->s_groups_count = (le32_to_cpu(es->s_blocks_count) - - le32_to_cpu(es->s_first_data_block) + - EXT2_BLOCKS_PER_GROUP(sb) - 1) / - EXT2_BLOCKS_PER_GROUP(sb); + sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) - + le32_to_cpu(es->s_first_data_block) - 1) + / EXT2_BLOCKS_PER_GROUP(sb)) + 1; db_count = (sbi->s_groups_count + EXT2_DESC_PER_BLOCK(sb) - 1) / EXT2_DESC_PER_BLOCK(sb); sbi->s_group_desc = kmalloc (db_count * sizeof (struct buffer_head *), GFP_KERNEL); if (sbi->s_group_desc == NULL) { - printk ("EXT2-fs: not enough memory\n"); + ext2_msg(sb, KERN_ERR, "error: not enough memory"); goto failed_mount; } - percpu_counter_init(&sbi->s_freeblocks_counter); - percpu_counter_init(&sbi->s_freeinodes_counter); - percpu_counter_init(&sbi->s_dirs_counter); - bgl_lock_init(&sbi->s_blockgroup_lock); - sbi->s_debts = kmalloc(sbi->s_groups_count * sizeof(*sbi->s_debts), - GFP_KERNEL); + bgl_lock_init(sbi->s_blockgroup_lock); + sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL); if (!sbi->s_debts) { - printk ("EXT2-fs: not enough memory\n"); + ext2_msg(sb, KERN_ERR, "error: not enough memory"); goto failed_mount_group_desc; } - memset(sbi->s_debts, 0, sbi->s_groups_count * sizeof(*sbi->s_debts)); for (i = 0; i < db_count; i++) { block = descriptor_loc(sb, logic_sb_block, i); sbi->s_group_desc[i] = sb_bread(sb, block); if (!sbi->s_group_desc[i]) { for (j = 0; j < i; j++) brelse (sbi->s_group_desc[j]); - printk ("EXT2-fs: unable to read group descriptors\n"); + ext2_msg(sb, KERN_ERR, + "error: unable to read group descriptors"); goto failed_mount_group_desc; } } if (!ext2_check_descriptors (sb)) { - printk ("EXT2-fs: group descriptors corrupted!\n"); - db_count = i; + ext2_msg(sb, KERN_ERR, "group descriptors corrupted"); goto failed_mount2; } sbi->s_gdb_count = db_count; get_random_bytes(&sbi->s_next_generation, sizeof(u32)); spin_lock_init(&sbi->s_next_gen_lock); + + /* per fileystem reservation list head & lock */ + spin_lock_init(&sbi->s_rsv_window_lock); + sbi->s_rsv_window_root = RB_ROOT; + /* + * Add a single, static dummy reservation to the start of the + * reservation window list --- it gives us a placeholder for + * append-at-start-of-list which makes the allocation logic + * _much_ simpler. + */ + sbi->s_rsv_window_head.rsv_start = EXT2_RESERVE_WINDOW_NOT_ALLOCATED; + sbi->s_rsv_window_head.rsv_end = EXT2_RESERVE_WINDOW_NOT_ALLOCATED; + sbi->s_rsv_window_head.rsv_alloc_hit = 0; + sbi->s_rsv_window_head.rsv_goal_size = 0; + ext2_rsv_window_add(sb, &sbi->s_rsv_window_head); + + err = percpu_counter_init(&sbi->s_freeblocks_counter, + ext2_count_free_blocks(sb)); + if (!err) { + err = percpu_counter_init(&sbi->s_freeinodes_counter, + ext2_count_free_inodes(sb)); + } + if (!err) { + err = percpu_counter_init(&sbi->s_dirs_counter, + ext2_count_dirs(sb)); + } + if (err) { + ext2_msg(sb, KERN_ERR, "error: insufficient memory"); + goto failed_mount3; + } /* * set up enough so that it can read an inode */ sb->s_op = &ext2_sops; sb->s_export_op = &ext2_export_ops; sb->s_xattr = ext2_xattr_handlers; - root = iget(sb, EXT2_ROOT_INO); + root = ext2_iget(sb, EXT2_ROOT_INO); + if (IS_ERR(root)) { + ret = PTR_ERR(root); + goto failed_mount3; + } + if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { + iput(root); + ext2_msg(sb, KERN_ERR, "error: corrupt root inode, run e2fsck"); + goto failed_mount3; + } + sb->s_root = d_alloc_root(root); if (!sb->s_root) { iput(root); - printk(KERN_ERR "EXT2-fs: get root inode failed\n"); - goto failed_mount2; - } - if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { - dput(sb->s_root); - sb->s_root = NULL; - printk(KERN_ERR "EXT2-fs: corrupt root inode, run e2fsck\n"); - goto failed_mount2; + ext2_msg(sb, KERN_ERR, "error: get root inode failed"); + ret = -ENOMEM; + goto failed_mount3; } if (EXT2_HAS_COMPAT_FEATURE(sb, EXT3_FEATURE_COMPAT_HAS_JOURNAL)) - ext2_warning(sb, __FUNCTION__, - "mounting ext3 filesystem as ext2"); + ext2_msg(sb, KERN_WARNING, + "warning: mounting ext3 filesystem as ext2"); ext2_setup_super (sb, es, sb->s_flags & MS_RDONLY); - percpu_counter_mod(&sbi->s_freeblocks_counter, - ext2_count_free_blocks(sb)); - percpu_counter_mod(&sbi->s_freeinodes_counter, - ext2_count_free_inodes(sb)); - percpu_counter_mod(&sbi->s_dirs_counter, - ext2_count_dirs(sb)); return 0; cantfind_ext2: if (!silent) - printk("VFS: Can't find an ext2 filesystem on dev %s.\n", - sb->s_id); + ext2_msg(sb, KERN_ERR, + "error: can't find an ext2 filesystem on dev %s.", + sb->s_id); goto failed_mount; - +failed_mount3: + percpu_counter_destroy(&sbi->s_freeblocks_counter); + percpu_counter_destroy(&sbi->s_freeinodes_counter); + percpu_counter_destroy(&sbi->s_dirs_counter); failed_mount2: for (i = 0; i < db_count; i++) brelse(sbi->s_group_desc[i]); @@ -907,13 +1102,35 @@ failed_mount: brelse(bh); failed_sbi: sb->s_fs_info = NULL; + kfree(sbi->s_blockgroup_lock); kfree(sbi); - return -EINVAL; + return ret; +} + +static void ext2_clear_super_error(struct super_block *sb) +{ + struct buffer_head *sbh = EXT2_SB(sb)->s_sbh; + + if (buffer_write_io_error(sbh)) { + /* + * Oh, dear. A previous attempt to write the + * superblock failed. This could happen because the + * USB device was yanked out. Or it could happen to + * be a transient write error and maybe the block will + * be remapped. Nothing we can do but to retry the + * write and hope for the best. + */ + printk(KERN_ERR "EXT2-fs: %s previous I/O error to " + "superblock detected", sb->s_id); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } } static void ext2_commit_super (struct super_block * sb, struct ext2_super_block * es) { + ext2_clear_super_error(sb); es->s_wtime = cpu_to_le32(get_seconds()); mark_buffer_dirty(EXT2_SB(sb)->s_sbh); sb->s_dirt = 0; @@ -921,6 +1138,7 @@ static void ext2_commit_super (struct super_block * sb, static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es) { + ext2_clear_super_error(sb); es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb)); es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb)); es->s_wtime = cpu_to_le32(get_seconds()); @@ -940,26 +1158,52 @@ static void ext2_sync_super(struct super_block *sb, struct ext2_super_block *es) * set s_state to EXT2_VALID_FS after some corrections. */ -void ext2_write_super (struct super_block * sb) +static int ext2_sync_fs(struct super_block *sb, int wait) { - struct ext2_super_block * es; + struct ext2_super_block *es = EXT2_SB(sb)->s_es; + struct buffer_head *sbh = EXT2_SB(sb)->s_sbh; + lock_kernel(); - if (!(sb->s_flags & MS_RDONLY)) { - es = EXT2_SB(sb)->s_es; - - if (le16_to_cpu(es->s_state) & EXT2_VALID_FS) { - ext2_debug ("setting valid to 0\n"); - es->s_state = cpu_to_le16(le16_to_cpu(es->s_state) & - ~EXT2_VALID_FS); - es->s_free_blocks_count = cpu_to_le32(ext2_count_free_blocks(sb)); - es->s_free_inodes_count = cpu_to_le32(ext2_count_free_inodes(sb)); - es->s_mtime = cpu_to_le32(get_seconds()); - ext2_sync_super(sb, es); - } else - ext2_commit_super (sb, es); + if (buffer_write_io_error(sbh)) { + /* + * Oh, dear. A previous attempt to write the + * superblock failed. This could happen because the + * USB device was yanked out. Or it could happen to + * be a transient write error and maybe the block will + * be remapped. Nothing we can do but to retry the + * write and hope for the best. + */ + ext2_msg(sb, KERN_ERR, + "previous I/O error to superblock detected\n"); + clear_buffer_write_io_error(sbh); + set_buffer_uptodate(sbh); + } + + if (es->s_state & cpu_to_le16(EXT2_VALID_FS)) { + ext2_debug("setting valid to 0\n"); + es->s_state &= cpu_to_le16(~EXT2_VALID_FS); + es->s_free_blocks_count = + cpu_to_le32(ext2_count_free_blocks(sb)); + es->s_free_inodes_count = + cpu_to_le32(ext2_count_free_inodes(sb)); + es->s_mtime = cpu_to_le32(get_seconds()); + ext2_sync_super(sb, es); + } else { + ext2_commit_super(sb, es); } sb->s_dirt = 0; unlock_kernel(); + + return 0; +} + + +void ext2_write_super(struct super_block *sb) +{ + if (!(sb->s_flags & MS_RDONLY)) + ext2_sync_fs(sb, 1); + else + sb->s_dirt = 0; } static int ext2_remount (struct super_block * sb, int * flags, char * data) @@ -971,6 +1215,8 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) unsigned long old_sb_flags; int err; + lock_kernel(); + /* Store the old options */ old_sb_flags = sb->s_flags; old_opts.s_mount_opt = sbi->s_mount_opt; @@ -980,7 +1226,7 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) /* * Allow the "check" option to be passed as a remount option. */ - if (!parse_options (data, sbi)) { + if (!parse_options(data, sb)) { err = -EINVAL; goto restore_opts; } @@ -988,18 +1234,35 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | ((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); + ext2_xip_verify_sb(sb); /* see if bdev supports xip, unset + EXT2_MOUNT_XIP if not */ + + if ((ext2_use_xip(sb)) && (sb->s_blocksize != PAGE_SIZE)) { + ext2_msg(sb, KERN_WARNING, + "warning: unsupported blocksize for xip"); + err = -EINVAL; + goto restore_opts; + } + es = sbi->s_es; if (((sbi->s_mount_opt & EXT2_MOUNT_XIP) != (old_mount_opt & EXT2_MOUNT_XIP)) && - invalidate_inodes(sb)) - ext2_warning(sb, __FUNCTION__, "busy inodes while remounting "\ - "xip remain in cache (no functional problem)"); - if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) + invalidate_inodes(sb)) { + ext2_msg(sb, KERN_WARNING, "warning: refusing change of " + "xip flag with busy inodes while remounting"); + sbi->s_mount_opt &= ~EXT2_MOUNT_XIP; + sbi->s_mount_opt |= old_mount_opt & EXT2_MOUNT_XIP; + } + if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) { + unlock_kernel(); return 0; + } if (*flags & MS_RDONLY) { if (le16_to_cpu(es->s_state) & EXT2_VALID_FS || - !(sbi->s_mount_state & EXT2_VALID_FS)) + !(sbi->s_mount_state & EXT2_VALID_FS)) { + unlock_kernel(); return 0; + } /* * OK, we are remounting a valid rw partition rdonly, so set * the rdonly flag and then mark the partition as valid again. @@ -1010,9 +1273,10 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) __le32 ret = EXT2_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP); if (ret) { - printk("EXT2-fs: %s: couldn't remount RDWR because of " - "unsupported optional features (%x).\n", - sb->s_id, le32_to_cpu(ret)); + ext2_msg(sb, KERN_WARNING, + "warning: couldn't remount RDWR because of " + "unsupported optional features (%x).", + le32_to_cpu(ret)); err = -EROFS; goto restore_opts; } @@ -1026,33 +1290,41 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) sb->s_flags &= ~MS_RDONLY; } ext2_sync_super(sb, es); + unlock_kernel(); return 0; restore_opts: sbi->s_mount_opt = old_opts.s_mount_opt; sbi->s_resuid = old_opts.s_resuid; sbi->s_resgid = old_opts.s_resgid; sb->s_flags = old_sb_flags; + unlock_kernel(); return err; } -static int ext2_statfs (struct super_block * sb, struct kstatfs * buf) +static int ext2_statfs (struct dentry * dentry, struct kstatfs * buf) { + struct super_block *sb = dentry->d_sb; struct ext2_sb_info *sbi = EXT2_SB(sb); - unsigned long overhead; - int i; + struct ext2_super_block *es = sbi->s_es; + u64 fsid; if (test_opt (sb, MINIX_DF)) - overhead = 0; - else { + sbi->s_overhead_last = 0; + else if (sbi->s_blocks_last != le32_to_cpu(es->s_blocks_count)) { + unsigned long i, overhead = 0; + smp_rmb(); + /* - * Compute the overhead (FS structures) + * Compute the overhead (FS structures). This is constant + * for a given filesystem unless the number of block groups + * changes so we cache the previous value until it does. */ /* * All of the blocks before first_data_block are * overhead */ - overhead = le32_to_cpu(sbi->s_es->s_first_data_block); + overhead = le32_to_cpu(es->s_first_data_block); /* * Add the overhead attributed to the superblock and @@ -1069,25 +1341,34 @@ static int ext2_statfs (struct super_block * sb, struct kstatfs * buf) */ overhead += (sbi->s_groups_count * (2 + sbi->s_itb_per_group)); + sbi->s_overhead_last = overhead; + smp_wmb(); + sbi->s_blocks_last = le32_to_cpu(es->s_blocks_count); } buf->f_type = EXT2_SUPER_MAGIC; buf->f_bsize = sb->s_blocksize; - buf->f_blocks = le32_to_cpu(sbi->s_es->s_blocks_count) - overhead; + buf->f_blocks = le32_to_cpu(es->s_blocks_count) - sbi->s_overhead_last; buf->f_bfree = ext2_count_free_blocks(sb); - buf->f_bavail = buf->f_bfree - le32_to_cpu(sbi->s_es->s_r_blocks_count); - if (buf->f_bfree < le32_to_cpu(sbi->s_es->s_r_blocks_count)) + es->s_free_blocks_count = cpu_to_le32(buf->f_bfree); + buf->f_bavail = buf->f_bfree - le32_to_cpu(es->s_r_blocks_count); + if (buf->f_bfree < le32_to_cpu(es->s_r_blocks_count)) buf->f_bavail = 0; - buf->f_files = le32_to_cpu(sbi->s_es->s_inodes_count); - buf->f_ffree = ext2_count_free_inodes (sb); + buf->f_files = le32_to_cpu(es->s_inodes_count); + buf->f_ffree = ext2_count_free_inodes(sb); + es->s_free_inodes_count = cpu_to_le32(buf->f_ffree); buf->f_namelen = EXT2_NAME_LEN; + fsid = le64_to_cpup((void *)es->s_uuid) ^ + le64_to_cpup((void *)es->s_uuid + sizeof(u64)); + buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; + buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; return 0; } -static struct super_block *ext2_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data) +static int ext2_get_sb(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data, struct vfsmount *mnt) { - return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super); + return get_sb_bdev(fs_type, flags, dev_name, data, ext2_fill_super, mnt); } #ifdef CONFIG_QUOTA @@ -1119,8 +1400,9 @@ static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, sb->s_blocksize - offset : toread; tmp_bh.b_state = 0; + tmp_bh.b_size = sb->s_blocksize; err = ext2_get_block(inode, blk, &tmp_bh, 0); - if (err) + if (err < 0) return err; if (!buffer_mapped(&tmp_bh)) /* A hole? */ memset(data, 0, tocopy); @@ -1152,14 +1434,14 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type, struct buffer_head tmp_bh; struct buffer_head *bh; - mutex_lock(&inode->i_mutex); + mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA); while (towrite > 0) { tocopy = sb->s_blocksize - offset < towrite ? sb->s_blocksize - offset : towrite; tmp_bh.b_state = 0; err = ext2_get_block(inode, blk, &tmp_bh, 1); - if (err) + if (err < 0) goto out; if (offset || tocopy != EXT2_BLOCK_SIZE(sb)) bh = sb_bread(sb, tmp_bh.b_blocknr); @@ -1182,8 +1464,10 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type, blk++; } out: - if (len == towrite) + if (len == towrite) { + mutex_unlock(&inode->i_mutex); return err; + } if (inode->i_size < off+len-towrite) i_size_write(inode, off+len-towrite); inode->i_version++;