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Lines 33-44
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| 33 |
#include <linux/backing-dev.h> |
33 |
#include <linux/backing-dev.h> |
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#include <linux/ramfs.h> |
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#include <linux/ramfs.h> |
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#include <linux/sched.h> |
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#include <linux/sched.h> |
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#include <linux/parser.h> |
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#include <asm/uaccess.h> |
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#include <asm/uaccess.h> |
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#include "internal.h" |
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#include "internal.h" |
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/* some random number */ |
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/* some random number */ |
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#define RAMFS_MAGIC 0x858458f6 |
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#define RAMFS_MAGIC 0x858458f6 |
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#define RAMFS_DEFAULT_MODE 0755 |
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static const struct super_operations ramfs_ops; |
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static const struct super_operations ramfs_ops; |
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static const struct inode_operations ramfs_dir_inode_operations; |
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static const struct inode_operations ramfs_dir_inode_operations; |
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Lines 158-169
static const struct inode_operations ram
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static const struct super_operations ramfs_ops = { |
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static const struct super_operations ramfs_ops = { |
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.statfs = simple_statfs, |
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.statfs = simple_statfs, |
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.drop_inode = generic_delete_inode, |
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.drop_inode = generic_delete_inode, |
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.show_options = generic_show_options, |
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}; |
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struct ramfs_mount_opts { |
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umode_t mode; |
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}; |
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enum { |
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Opt_mode, |
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Opt_err |
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}; |
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static const match_table_t tokens = { |
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{Opt_mode, "mode=%o"}, |
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{Opt_err, NULL} |
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}; |
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}; |
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struct ramfs_fs_info { |
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struct ramfs_mount_opts mount_opts; |
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}; |
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| 185 |
static int ramfs_parse_options(char *data, struct ramfs_mount_opts *opts) |
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{ |
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substring_t args[MAX_OPT_ARGS]; |
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int option; |
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int token; |
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char *p; |
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opts->mode = RAMFS_DEFAULT_MODE; |
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while ((p = strsep(&data, ",")) != NULL) { |
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if (!*p) |
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continue; |
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token = match_token(p, tokens, args); |
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switch (token) { |
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case Opt_mode: |
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if (match_octal(&args[0], &option)) |
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return -EINVAL; |
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opts->mode = option & S_IALLUGO; |
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break; |
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default: |
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printk(KERN_ERR "ramfs: bad mount option: %s\n", p); |
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return -EINVAL; |
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} |
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} |
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return 0; |
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} |
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static int ramfs_fill_super(struct super_block * sb, void * data, int silent) |
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static int ramfs_fill_super(struct super_block * sb, void * data, int silent) |
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{ |
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{ |
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struct inode * inode; |
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struct ramfs_fs_info *fsi; |
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struct dentry * root; |
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struct inode *inode = NULL; |
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struct dentry *root; |
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int err; |
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save_mount_options(sb, data); |
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fsi = kzalloc(sizeof(struct ramfs_fs_info), GFP_KERNEL); |
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if (!fsi) { |
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err = -ENOMEM; |
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goto fail; |
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} |
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sb->s_fs_info = fsi; |
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err = ramfs_parse_options(data, &fsi->mount_opts); |
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if (err) |
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goto fail; |
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sb->s_maxbytes = MAX_LFS_FILESIZE; |
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sb->s_maxbytes = MAX_LFS_FILESIZE; |
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sb->s_blocksize = PAGE_CACHE_SIZE; |
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sb->s_blocksize = PAGE_CACHE_SIZE; |
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Lines 171-187
static int ramfs_fill_super(struct super
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sb->s_magic = RAMFS_MAGIC; |
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sb->s_magic = RAMFS_MAGIC; |
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sb->s_op = &ramfs_ops; |
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sb->s_op = &ramfs_ops; |
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sb->s_time_gran = 1; |
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sb->s_time_gran = 1; |
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inode = ramfs_get_inode(sb, S_IFDIR | 0755, 0); |
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inode = ramfs_get_inode(sb, S_IFDIR | fsi->mount_opts.mode, 0); |
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if (!inode) |
241 |
if (!inode) { |
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return -ENOMEM; |
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err = -ENOMEM; |
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goto fail; |
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} |
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root = d_alloc_root(inode); |
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root = d_alloc_root(inode); |
| 179 |
if (!root) { |
247 |
if (!root) { |
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iput(inode); |
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err = -ENOMEM; |
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return -ENOMEM; |
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goto fail; |
| 182 |
} |
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} |
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sb->s_root = root; |
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sb->s_root = root; |
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return 0; |
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return 0; |
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fail: |
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kfree(fsi); |
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iput(inode); |
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return err; |
| 185 |
} |
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} |
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int ramfs_get_sb(struct file_system_type *fs_type, |
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int ramfs_get_sb(struct file_system_type *fs_type, |
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Lines 197-206
static int rootfs_get_sb(struct file_sys
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mnt); |
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mnt); |
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} |
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} |
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static void ramfs_kill_sb(struct super_block *sb) |
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{ |
| 274 |
kfree(sb->s_fs_info); |
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kill_litter_super(sb); |
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} |
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| 200 |
static struct file_system_type ramfs_fs_type = { |
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static struct file_system_type ramfs_fs_type = { |
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.name = "ramfs", |
279 |
.name = "ramfs", |
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.get_sb = ramfs_get_sb, |
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.get_sb = ramfs_get_sb, |
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.kill_sb = kill_litter_super, |
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.kill_sb = ramfs_kill_sb, |
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}; |
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}; |
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static struct file_system_type rootfs_fs_type = { |
283 |
static struct file_system_type rootfs_fs_type = { |
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.name = "rootfs", |
284 |
.name = "rootfs", |
