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ext2: get rid of most mentions of XIP in ext2 

To help people transition, accept the 'xip' mount option (and report it in
/proc/mounts), but print a message encouraging people to switch over to
the 'dax' option.

Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Andreas Dilger <andreas.dilger@intel.com>
Cc: Boaz Harrosh <boaz@plexistor.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2015-02-16 15:59:31 -08:00 committed by Linus Torvalds
parent 97443aa809
commit 9c3ce9ec58
6 changed files with 34 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/filesystems/ext2.txt
View File

@ -20,6 +20,9 @@ minixdf Makes `df' act like Minix.
check=none, nocheck (*) Don't do extra checking of bitmaps on mount
(check=normal and check=strict options removed)
dax Use direct access (no page cache). See
Documentation/filesystems/dax.txt.
debug Extra debugging information is sent to the
kernel syslog. Useful for developers.
@ -56,8 +59,6 @@ noacl Don't support POSIX ACLs.
nobh Do not attach buffer_heads to file pagecache.
xip Use execute in place (no caching) if possible
grpquota,noquota,quota,usrquota Quota options are silently ignored by ext2.

13
fs/ext2/ext2.h
View File

@ -380,14 +380,15 @@ struct ext2_inode {
#define EXT2_MOUNT_NO_UID32 0x000200 /* Disable 32-bit UIDs */
#define EXT2_MOUNT_XATTR_USER 0x004000 /* Extended user attributes */
#define EXT2_MOUNT_POSIX_ACL 0x008000 /* POSIX Access Control Lists */
#ifdef CONFIG_FS_DAX
#define EXT2_MOUNT_XIP 0x010000 /* Execute in place */
#else
#define EXT2_MOUNT_XIP 0
#endif
#define EXT2_MOUNT_XIP 0x010000 /* Obsolete, use DAX */
#define EXT2_MOUNT_USRQUOTA 0x020000 /* user quota */
#define EXT2_MOUNT_GRPQUOTA 0x040000 /* group quota */
#define EXT2_MOUNT_RESERVATION 0x080000 /* Preallocation */
#ifdef CONFIG_FS_DAX
#define EXT2_MOUNT_DAX 0x100000 /* Direct Access */
#else
#define EXT2_MOUNT_DAX 0
#endif
#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
@ -792,7 +793,7 @@ extern int ext2_fsync(struct file *file, loff_t start, loff_t end,
int datasync);
extern const struct inode_operations ext2_file_inode_operations;
extern const struct file_operations ext2_file_operations;
extern const struct file_operations ext2_xip_file_operations;
extern const struct file_operations ext2_dax_file_operations;
/* inode.c */
extern const struct address_space_operations ext2_aops;

2
fs/ext2/file.c
View File

@ -109,7 +109,7 @@ const struct file_operations ext2_file_operations = {
};
#ifdef CONFIG_FS_DAX
const struct file_operations ext2_xip_file_operations = {
const struct file_operations ext2_dax_file_operations = {
.llseek = generic_file_llseek,
.read = new_sync_read,
.write = new_sync_write,

6
fs/ext2/inode.c
View File

@ -1286,7 +1286,7 @@ void ext2_set_inode_flags(struct inode *inode)
inode->i_flags |= S_NOATIME;
if (flags & EXT2_DIRSYNC_FL)
inode->i_flags |= S_DIRSYNC;
if (test_opt(inode->i_sb, XIP))
if (test_opt(inode->i_sb, DAX))
inode->i_flags |= S_DAX;
}
@ -1388,9 +1388,9 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
if (S_ISREG(inode->i_mode)) {
inode->i_op = &ext2_file_inode_operations;
if (test_opt(inode->i_sb, XIP)) {
if (test_opt(inode->i_sb, DAX)) {
inode->i_mapping->a_ops = &ext2_aops;
inode->i_fop = &ext2_xip_file_operations;
inode->i_fop = &ext2_dax_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;

8
fs/ext2/namei.c
View File

@ -104,9 +104,9 @@ static int ext2_create (struct inode * dir, struct dentry * dentry, umode_t mode
return PTR_ERR(inode);
inode->i_op = &ext2_file_inode_operations;
if (test_opt(inode->i_sb, XIP)) {
if (test_opt(inode->i_sb, DAX)) {
inode->i_mapping->a_ops = &ext2_aops;
inode->i_fop = &ext2_xip_file_operations;
inode->i_fop = &ext2_dax_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;
@ -125,9 +125,9 @@ static int ext2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
return PTR_ERR(inode);
inode->i_op = &ext2_file_inode_operations;
if (test_opt(inode->i_sb, XIP)) {
if (test_opt(inode->i_sb, DAX)) {
inode->i_mapping->a_ops = &ext2_aops;
inode->i_fop = &ext2_xip_file_operations;
inode->i_fop = &ext2_dax_file_operations;
} else if (test_opt(inode->i_sb, NOBH)) {
inode->i_mapping->a_ops = &ext2_nobh_aops;
inode->i_fop = &ext2_file_operations;

25
fs/ext2/super.c
View File

@ -294,6 +294,8 @@ static int ext2_show_options(struct seq_file *seq, struct dentry *root)
#ifdef CONFIG_FS_DAX
if (sbi->s_mount_opt & EXT2_MOUNT_XIP)
seq_puts(seq, ",xip");
if (sbi->s_mount_opt & EXT2_MOUNT_DAX)
seq_puts(seq, ",dax");
#endif
if (!test_opt(sb, RESERVATION))
@ -402,7 +404,7 @@ enum {
Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
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_acl, Opt_noacl, Opt_xip, Opt_dax, Opt_ignore, Opt_err, Opt_quota,
Opt_usrquota, Opt_grpquota, Opt_reservation, Opt_noreservation
};
@ -431,6 +433,7 @@ static const match_table_t tokens = {
{Opt_acl, "acl"},
{Opt_noacl, "noacl"},
{Opt_xip, "xip"},
{Opt_dax, "dax"},
{Opt_grpquota, "grpquota"},
{Opt_ignore, "noquota"},
{Opt_quota, "quota"},
@ -558,10 +561,14 @@ static int parse_options(char *options, struct super_block *sb)
break;
#endif
case Opt_xip:
ext2_msg(sb, KERN_INFO, "use dax instead of xip");
set_opt(sbi->s_mount_opt, XIP);
/* Fall through */
case Opt_dax:
#ifdef CONFIG_FS_DAX
set_opt (sbi->s_mount_opt, XIP);
set_opt(sbi->s_mount_opt, DAX);
#else
ext2_msg(sb, KERN_INFO, "xip option not supported");
ext2_msg(sb, KERN_INFO, "dax option not supported");
#endif
break;
@ -905,15 +912,15 @@ 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 (sbi->s_mount_opt & EXT2_MOUNT_XIP) {
if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
if (blocksize != PAGE_SIZE) {
ext2_msg(sb, KERN_ERR,
"error: unsupported blocksize for xip");
"error: unsupported blocksize for dax");
goto failed_mount;
}
if (!sb->s_bdev->bd_disk->fops->direct_access) {
ext2_msg(sb, KERN_ERR,
"error: device does not support xip");
"error: device does not support dax");
goto failed_mount;
}
}
@ -1286,10 +1293,10 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? MS_POSIXACL : 0);
es = sbi->s_es;
if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT2_MOUNT_XIP) {
if ((sbi->s_mount_opt ^ old_opts.s_mount_opt) & EXT2_MOUNT_DAX) {
ext2_msg(sb, KERN_WARNING, "warning: refusing change of "
"xip flag with busy inodes while remounting");
sbi->s_mount_opt ^= EXT2_MOUNT_XIP;
"dax flag with busy inodes while remounting");
sbi->s_mount_opt ^= EXT2_MOUNT_DAX;
}
if ((*flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
spin_unlock(&sbi->s_lock);