diff options
Diffstat (limited to 'fs/ext2/super.c')
| -rw-r--r-- | fs/ext2/super.c | 83 |
1 files changed, 73 insertions, 10 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 876e391f2871..3c0c7c6a5b44 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -19,6 +19,7 @@ #include <linux/config.h> #include <linux/module.h> #include <linux/string.h> +#include <linux/fs.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/blkdev.h> @@ -27,6 +28,8 @@ #include <linux/buffer_head.h> #include <linux/smp_lock.h> #include <linux/vfs.h> +#include <linux/seq_file.h> +#include <linux/mount.h> #include <asm/uaccess.h> #include "ext2.h" #include "xattr.h" @@ -201,6 +204,26 @@ static void ext2_clear_inode(struct inode *inode) #endif } +static int ext2_show_options(struct seq_file *seq, struct vfsmount *vfs) +{ + struct ext2_sb_info *sbi = EXT2_SB(vfs->mnt_sb); + + if (sbi->s_mount_opt & EXT2_MOUNT_GRPID) + seq_puts(seq, ",grpid"); + else + seq_puts(seq, ",nogrpid"); + +#if defined(CONFIG_QUOTA) + if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA) + seq_puts(seq, ",usrquota"); + + if (sbi->s_mount_opt & EXT2_MOUNT_GRPQUOTA) + seq_puts(seq, ",grpquota"); +#endif + + return 0; +} + #ifdef CONFIG_QUOTA static ssize_t ext2_quota_read(struct super_block *sb, int type, char *data, size_t len, loff_t off); static ssize_t ext2_quota_write(struct super_block *sb, int type, const char *data, size_t len, loff_t off); @@ -218,6 +241,7 @@ static struct super_operations ext2_sops = { .statfs = ext2_statfs, .remount_fs = ext2_remount, .clear_inode = ext2_clear_inode, + .show_options = ext2_show_options, #ifdef CONFIG_QUOTA .quota_read = ext2_quota_read, .quota_write = ext2_quota_write, @@ -256,10 +280,11 @@ static unsigned long get_sb_block(void **data) enum { Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, - Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, - Opt_nouid32, Opt_check, 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_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, + Opt_err_ro, Opt_nouid32, Opt_check, 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 }; static match_table_t tokens = { @@ -288,10 +313,10 @@ static match_table_t tokens = { {Opt_acl, "acl"}, {Opt_noacl, "noacl"}, {Opt_xip, "xip"}, - {Opt_ignore, "grpquota"}, + {Opt_grpquota, "grpquota"}, {Opt_ignore, "noquota"}, - {Opt_ignore, "quota"}, - {Opt_ignore, "usrquota"}, + {Opt_quota, "quota"}, + {Opt_usrquota, "usrquota"}, {Opt_err, NULL} }; @@ -406,6 +431,26 @@ static int parse_options (char * options, printk("EXT2 xip option not supported\n"); #endif break; + +#if defined(CONFIG_QUOTA) + case Opt_quota: + case Opt_usrquota: + set_opt(sbi->s_mount_opt, USRQUOTA); + break; + + case Opt_grpquota: + set_opt(sbi->s_mount_opt, GRPQUOTA); + break; +#else + case Opt_quota: + case Opt_usrquota: + case Opt_grpquota: + printk(KERN_ERR + "EXT2-fs: quota operations not supported.\n"); + + break; +#endif + case Opt_ignore: break; default: @@ -936,12 +981,23 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) struct ext2_sb_info * sbi = EXT2_SB(sb); struct ext2_super_block * es; unsigned long old_mount_opt = sbi->s_mount_opt; + struct ext2_mount_options old_opts; + unsigned long old_sb_flags; + int err; + + /* Store the old options */ + old_sb_flags = sb->s_flags; + old_opts.s_mount_opt = sbi->s_mount_opt; + old_opts.s_resuid = sbi->s_resuid; + old_opts.s_resgid = sbi->s_resgid; /* * Allow the "check" option to be passed as a remount option. */ - if (!parse_options (data, sbi)) - return -EINVAL; + if (!parse_options (data, sbi)) { + err = -EINVAL; + goto restore_opts; + } sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | ((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0); @@ -971,7 +1027,8 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) printk("EXT2-fs: %s: couldn't remount RDWR because of " "unsupported optional features (%x).\n", sb->s_id, le32_to_cpu(ret)); - return -EROFS; + err = -EROFS; + goto restore_opts; } /* * Mounting a RDONLY partition read-write, so reread and @@ -984,6 +1041,12 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data) } ext2_sync_super(sb, es); 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; + return err; } static int ext2_statfs (struct super_block * sb, struct kstatfs * buf) |