X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fext2%2Fsuper.c;h=75af3fbe838472268bc1f75d2061630a3c02b13a;hb=13f14b4d8be225cbb11ff2be7c048590a9ccf87b;hp=639a32c3c9c1cea8a3da126c334284bd5be4e21d;hpb=6869ce1c145aaea9f9f8eb8623a261d316b0cd19;p=linux-2.6 diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 639a32c3c9..75af3fbe83 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include "ext2.h" #include "xattr.h" @@ -148,6 +149,7 @@ static struct inode *ext2_alloc_inode(struct super_block *sb) 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; } @@ -157,7 +159,7 @@ static void ext2_destroy_inode(struct inode *inode) kmem_cache_free(ext2_inode_cachep, EXT2_I(inode)); } -static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) +static void init_once(struct kmem_cache * cachep, void *foo) { struct ext2_inode_info *ei = (struct ext2_inode_info *) foo; @@ -165,6 +167,7 @@ static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flag #ifdef CONFIG_EXT2_FS_XATTR init_rwsem(&ei->xattr_sem); #endif + mutex_init(&ei->truncate_mutex); inode_init_once(&ei->vfs_inode); } @@ -187,6 +190,7 @@ static void destroy_inodecache(void) static void ext2_clear_inode(struct inode *inode) { + struct ext2_block_alloc_info *rsv = EXT2_I(inode)->i_block_alloc_info; #ifdef CONFIG_EXT2_FS_POSIX_ACL struct ext2_inode_info *ei = EXT2_I(inode); @@ -199,14 +203,74 @@ static void ext2_clear_inode(struct inode *inode) ei->i_default_acl = EXT2_ACL_NOT_CACHED; } #endif + 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; - if (sbi->s_mount_opt & EXT2_MOUNT_GRPID) + def_mount_opts = le32_to_cpu(es->s_default_mount_opts); + + 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"); + 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) @@ -234,7 +298,6 @@ static const struct super_operations ext2_sops = { .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, @@ -248,13 +311,10 @@ static const struct super_operations ext2_sops = { #endif }; -static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp) +static struct inode *ext2_nfs_get_inode(struct super_block *sb, + u64 ino, u32 generation) { - __u32 *objp = vobjp; - unsigned long ino = objp[0]; - __u32 generation = objp[1]; struct inode *inode; - struct dentry *result; if (ino < EXT2_FIRST_INO(sb) && ino != EXT2_ROOT_INO) return ERR_PTR(-ESTALE); @@ -275,15 +335,21 @@ static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp) iput(inode); return ERR_PTR(-ESTALE); } - /* now to find a dentry. - * If possible, get a well-connected one - */ - result = d_alloc_anon(inode); - if (!result) { - iput(inode); - return ERR_PTR(-ENOMEM); - } - return result; + 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!! @@ -291,9 +357,10 @@ static struct dentry *ext2_get_dentry(struct super_block *sb, void *vobjp) * systems, but can be improved upon. * Currently only get_parent is required. */ -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, - .get_dentry = ext2_get_dentry, }; static unsigned long get_sb_block(void **data) @@ -322,7 +389,7 @@ 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 = { @@ -354,6 +421,8 @@ static match_table_t tokens = { {Opt_ignore, "noquota"}, {Opt_quota, "quota"}, {Opt_usrquota, "usrquota"}, + {Opt_reservation, "reservation"}, + {Opt_noreservation, "noreservation"}, {Opt_err, NULL} }; @@ -486,6 +555,14 @@ static int parse_options (char * options, break; #endif + case Opt_reservation: + set_opt(sbi->s_mount_opt, RESERVATION); + printk("reservations ON\n"); + break; + case Opt_noreservation: + clear_opt(sbi->s_mount_opt, RESERVATION); + printk("reservations OFF\n"); + break; case Opt_ignore: break; default: @@ -603,11 +680,31 @@ 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)); @@ -615,6 +712,10 @@ 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; } @@ -653,11 +754,13 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) int db_count; int i, j; __le32 features; + int err; sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); if (!sbi) return -ENOMEM; sb->s_fs_info = sbi; + sbi->s_sb_block = sb_block; /* * See what the current blocksize for the device is, and @@ -717,14 +820,16 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) 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) - set_opt(sbi->s_mount_opt, ERRORS_RO); - else + 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); + set_opt(sbi->s_mount_opt, RESERVATION); + if (!parse_options ((char *) data, sbi)) goto failed_mount; @@ -763,8 +868,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) 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"); goto failed_mount; @@ -804,7 +908,7 @@ 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", sbi->s_inode_size); @@ -906,12 +1010,35 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) get_random_bytes(&sbi->s_next_generation, sizeof(u32)); spin_lock_init(&sbi->s_next_gen_lock); - percpu_counter_init(&sbi->s_freeblocks_counter, + /* 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)); - percpu_counter_init(&sbi->s_freeinodes_counter, + if (!err) { + err = percpu_counter_init(&sbi->s_freeinodes_counter, ext2_count_free_inodes(sb)); - percpu_counter_init(&sbi->s_dirs_counter, + } + if (!err) { + err = percpu_counter_init(&sbi->s_dirs_counter, ext2_count_dirs(sb)); + } + if (err) { + printk(KERN_ERR "EXT2-fs: insufficient memory\n"); + goto failed_mount3; + } /* * set up enough so that it can read an inode */ @@ -1193,7 +1320,7 @@ static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, tmp_bh.b_state = 0; 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); @@ -1232,7 +1359,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type, 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);