#include <linux/blkdev.h>
#include <linux/mm.h>
#include <linux/smp_lock.h>
-#include <linux/gfs2_ioctl.h>
#include <linux/fs.h>
#include <linux/gfs2_ondisk.h>
+#include <linux/ext2_fs.h>
+#include <linux/crc32.h>
#include <asm/semaphore.h>
#include <asm/uaccess.h>
#include "rgrp.h"
#include "trans.h"
#include "util.h"
+#include "eaops.h"
/* "bad" is for NFS support */
struct filldir_bad_entry {
static int readdir_reg(struct file *file, void *dirent, filldir_t filldir)
{
- struct gfs2_inode *dip = file->f_mapping->host->u.generic_ip;
+ struct inode *dir = file->f_mapping->host;
+ struct gfs2_inode *dip = dir->u.generic_ip;
struct filldir_reg fdr;
struct gfs2_holder d_gh;
uint64_t offset = file->f_pos;
return error;
}
- error = gfs2_dir_read(dip, &offset, &fdr, filldir_reg_func);
+ error = gfs2_dir_read(dir, &offset, &fdr, filldir_reg_func);
gfs2_glock_dq_uninit(&d_gh);
static int readdir_bad(struct file *file, void *dirent, filldir_t filldir)
{
- struct gfs2_inode *dip = file->f_mapping->host->u.generic_ip;
+ struct inode *dir = file->f_mapping->host;
+ struct gfs2_inode *dip = dir->u.generic_ip;
struct gfs2_sbd *sdp = dip->i_sbd;
struct filldir_reg fdr;
unsigned int entries, size;
goto out;
}
- error = gfs2_dir_read(dip, &offset, fdb, filldir_bad_func);
+ error = gfs2_dir_read(dir, &offset, fdb, filldir_bad_func);
gfs2_glock_dq_uninit(&d_gh);
return error;
}
-static int gfs2_ioctl_flags(struct gfs2_inode *ip, unsigned int cmd,
- unsigned long arg)
-{
- unsigned int lmode = (cmd == GFS2_IOCTL_SETFLAGS) ?
- LM_ST_EXCLUSIVE : LM_ST_SHARED;
- struct buffer_head *dibh;
- struct gfs2_holder i_gh;
- int error;
- __u32 flags = 0, change;
+const struct gfs2_flag_eattr {
+ u32 flag;
+ u32 ext2;
+} gfs2_flag_eattrs[] = {
+ {
+ .flag = GFS2_DIF_IMMUTABLE,
+ .ext2 = EXT2_IMMUTABLE_FL,
+ }, {
+ .flag = GFS2_DIF_APPENDONLY,
+ .ext2 = EXT2_APPEND_FL,
+ }, {
+ .flag = GFS2_DIF_JDATA,
+ .ext2 = EXT2_JOURNAL_DATA_FL,
+ }, {
+ .flag = GFS2_DIF_EXHASH,
+ .ext2 = EXT2_INDEX_FL,
+ }, {
+ .flag = GFS2_DIF_EA_INDIRECT,
+ }, {
+ .flag = GFS2_DIF_DIRECTIO,
+ }, {
+ .flag = GFS2_DIF_NOATIME,
+ .ext2 = EXT2_NOATIME_FL,
+ }, {
+ .flag = GFS2_DIF_SYNC,
+ .ext2 = EXT2_SYNC_FL,
+ }, {
+ .flag = GFS2_DIF_SYSTEM,
+ }, {
+ .flag = GFS2_DIF_TRUNC_IN_PROG,
+ }, {
+ .flag = GFS2_DIF_INHERIT_JDATA,
+ }, {
+ .flag = GFS2_DIF_INHERIT_DIRECTIO,
+ }, {
+ },
+};
- if (cmd == GFS2_IOCTL_SETFLAGS) {
- error = get_user(flags, (__u32 __user *)arg);
- if (error)
- return -EFAULT;
+static const struct gfs2_flag_eattr *get_by_ext2(u32 ext2)
+{
+ const struct gfs2_flag_eattr *p = gfs2_flag_eattrs;
+ for(; p->flag; p++) {
+ if (ext2 == p->ext2)
+ return p;
}
+ return NULL;
+}
- error = gfs2_glock_nq_init(ip->i_gl, lmode, 0, &i_gh);
- if (error)
- return error;
+static const struct gfs2_flag_eattr *get_by_gfs2(u32 gfs2)
+{
+ const struct gfs2_flag_eattr *p = gfs2_flag_eattrs;
+ for(; p->flag; p++) {
+ if (gfs2 == p->flag)
+ return p;
+ }
+ return NULL;
+}
- if (cmd == GFS2_IOCTL_SETFLAGS) {
- change = flags ^ ip->i_di.di_flags;
- error = -EPERM;
- if (change & (GFS2_DIF_IMMUTABLE|GFS2_DIF_APPENDONLY)) {
- if (!capable(CAP_LINUX_IMMUTABLE))
- goto out;
- }
- error = -EINVAL;
- if (flags & (GFS2_DIF_JDATA|GFS2_DIF_DIRECTIO)) {
- if (!S_ISREG(ip->i_di.di_mode))
- goto out;
- }
- if (flags &
- (GFS2_DIF_INHERIT_JDATA|GFS2_DIF_INHERIT_DIRECTIO)) {
- if (!S_ISDIR(ip->i_di.di_mode))
- goto out;
+static u32 gfs2_flags_to_ext2(u32 gfs2)
+{
+ const struct gfs2_flag_eattr *ea;
+ u32 ext2 = 0;
+ u32 mask = 1;
+
+ for(; mask != 0; mask <<=1) {
+ if (mask & gfs2) {
+ ea = get_by_gfs2(mask);
+ if (ea)
+ ext2 |= ea->ext2;
}
+ }
+ return ext2;
+}
- error = gfs2_trans_begin(ip->i_sbd, RES_DINODE, 0);
- if (error)
- goto out;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- goto out_trans_end;
+static int gfs2_flags_from_ext2(u32 *gfs2, u32 ext2)
+{
+ const struct gfs2_flag_eattr *ea;
+ u32 mask = 1;
+
+ for(; mask != 0; mask <<= 1) {
+ if (mask & ext2) {
+ ea = get_by_ext2(mask);
+ if (ea == NULL)
+ return -EINVAL;
+ *gfs2 |= ea->flag;
+ }
+ }
+ return 0;
+}
- ip->i_di.di_flags = flags;
+static int get_ext2_flags(struct inode *inode, u32 __user *ptr)
+{
+ struct gfs2_inode *ip = inode->u.generic_ip;
+ struct gfs2_holder gh;
+ int error;
+ u32 ext2;
- gfs2_trans_add_bh(ip->i_gl, dibh, 1);
- gfs2_dinode_out(&ip->i_di, dibh->b_data);
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &gh);
+ error = gfs2_glock_nq_m_atime(1, &gh);
+ if (error)
+ return error;
- brelse(dibh);
+ ext2 = gfs2_flags_to_ext2(ip->i_di.di_flags);
+ if (put_user(ext2, ptr))
+ error = -EFAULT;
-out_trans_end:
- gfs2_trans_end(ip->i_sbd);
- } else {
- flags = ip->i_di.di_flags;
- }
-out:
- gfs2_glock_dq_uninit(&i_gh);
- if (cmd == GFS2_IOCTL_GETFLAGS) {
- if (put_user(flags, (__u32 __user *)arg))
- return -EFAULT;
- }
+ gfs2_glock_dq_m(1, &gh);
+ gfs2_holder_uninit(&gh);
return error;
}
+/* Flags that can be set by user space */
+#define GFS2_FLAGS_USER_SET (GFS2_DIF_JDATA| \
+ GFS2_DIF_DIRECTIO| \
+ GFS2_DIF_IMMUTABLE| \
+ GFS2_DIF_APPENDONLY| \
+ GFS2_DIF_NOATIME| \
+ GFS2_DIF_SYNC| \
+ GFS2_DIF_SYSTEM| \
+ GFS2_DIF_INHERIT_DIRECTIO| \
+ GFS2_DIF_INHERIT_JDATA)
+
/**
- * gfs2_ioctl - do an ioctl on a file
- * @inode: the inode
- * @file: the file pointer
- * @cmd: the ioctl command
- * @arg: the argument
+ * gfs2_set_flags - set flags on an inode
+ * @inode: The inode
+ * @flags: The flags to set
+ * @mask: Indicates which flags are valid
*
- * Returns: errno
*/
-
-static int gfs2_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
- unsigned long arg)
+static int gfs2_set_flags(struct inode *inode, u32 flags, u32 mask)
{
struct gfs2_inode *ip = inode->u.generic_ip;
+ struct buffer_head *bh;
+ struct gfs2_holder gh;
+ int error;
+ u32 new_flags;
+
+ gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
+ if (error)
+ return error;
+
+ new_flags = (ip->i_di.di_flags & ~mask) | (flags & mask);
+ if ((new_flags ^ flags) == 0)
+ goto out;
+
+ error = -EINVAL;
+ if ((new_flags ^ flags) & ~GFS2_FLAGS_USER_SET)
+ goto out;
+
+ if (S_ISDIR(inode->i_mode)) {
+ if ((new_flags ^ flags) & (GFS2_DIF_JDATA | GFS2_DIF_DIRECTIO))
+ goto out;
+ } else if (S_ISREG(inode->i_mode)) {
+ if ((new_flags ^ flags) & (GFS2_DIF_INHERIT_DIRECTIO|
+ GFS2_DIF_INHERIT_JDATA))
+ goto out;
+ } else
+ goto out;
+
+ error = -EPERM;
+ if (IS_IMMUTABLE(inode) && (new_flags & GFS2_DIF_IMMUTABLE))
+ goto out;
+ if (IS_APPEND(inode) && (new_flags & GFS2_DIF_APPENDONLY))
+ goto out;
+ error = gfs2_repermission(inode, MAY_WRITE, NULL);
+ if (error)
+ goto out;
+
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ goto out;
+ gfs2_trans_add_bh(ip->i_gl, bh, 1);
+ ip->i_di.di_flags = new_flags;
+ gfs2_dinode_out(&ip->i_di, bh->b_data);
+ brelse(bh);
+out:
+ gfs2_glock_dq_uninit(&gh);
+ return error;
+}
- switch (cmd) {
- case GFS2_IOCTL_SETFLAGS:
- case GFS2_IOCTL_GETFLAGS:
- return gfs2_ioctl_flags(ip, cmd, arg);
+static int set_ext2_flags(struct inode *inode, u32 __user *ptr)
+{
+ u32 ext2, gfs2;
+ if (get_user(ext2, ptr))
+ return -EFAULT;
+ if (gfs2_flags_from_ext2(&gfs2, ext2))
+ return -EINVAL;
+ return gfs2_set_flags(inode, gfs2, ~0);
+}
- default:
- return -ENOTTY;
+int gfs2_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ switch(cmd) {
+ case EXT2_IOC_GETFLAGS:
+ return get_ext2_flags(inode, (u32 __user *)arg);
+ case EXT2_IOC_SETFLAGS:
+ return set_ext2_flags(inode, (u32 __user *)arg);
}
+ return -ENOTTY;
}
+
/**
* gfs2_mmap -
* @file: The file to map
projects / deliverable / linux.git / blobdiff