diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/hpfs/ea.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/hpfs/ea.c | 367 |
1 files changed, 0 insertions, 367 deletions
diff --git a/ANDROID_3.4.5/fs/hpfs/ea.c b/ANDROID_3.4.5/fs/hpfs/ea.c deleted file mode 100644 index d8b84d11..00000000 --- a/ANDROID_3.4.5/fs/hpfs/ea.c +++ /dev/null @@ -1,367 +0,0 @@ -/* - * linux/fs/hpfs/ea.c - * - * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 - * - * handling extended attributes - */ - -#include "hpfs_fn.h" - -/* Remove external extended attributes. ano specifies whether a is a - direct sector where eas starts or an anode */ - -void hpfs_ea_ext_remove(struct super_block *s, secno a, int ano, unsigned len) -{ - unsigned pos = 0; - while (pos < len) { - char ex[4 + 255 + 1 + 8]; - struct extended_attribute *ea = (struct extended_attribute *)ex; - if (pos + 4 > len) { - hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x", - ano ? "anode" : "sectors", a, len); - return; - } - if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return; - if (ea->indirect) { - if (ea_valuelen(ea) != 8) { - hpfs_error(s, "ea->indirect set while ea->valuelen!=8, %s %08x, pos %08x", - ano ? "anode" : "sectors", a, pos); - return; - } - if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 9, ex+4)) - return; - hpfs_ea_remove(s, ea_sec(ea), ea->anode, ea_len(ea)); - } - pos += ea->namelen + ea_valuelen(ea) + 5; - } - if (!ano) hpfs_free_sectors(s, a, (len+511) >> 9); - else { - struct buffer_head *bh; - struct anode *anode; - if ((anode = hpfs_map_anode(s, a, &bh))) { - hpfs_remove_btree(s, &anode->btree); - brelse(bh); - hpfs_free_sectors(s, a, 1); - } - } -} - -static char *get_indirect_ea(struct super_block *s, int ano, secno a, int size) -{ - char *ret; - if (!(ret = kmalloc(size + 1, GFP_NOFS))) { - printk("HPFS: out of memory for EA\n"); - return NULL; - } - if (hpfs_ea_read(s, a, ano, 0, size, ret)) { - kfree(ret); - return NULL; - } - ret[size] = 0; - return ret; -} - -static void set_indirect_ea(struct super_block *s, int ano, secno a, - const char *data, int size) -{ - hpfs_ea_write(s, a, ano, 0, size, data); -} - -/* Read an extended attribute named 'key' into the provided buffer */ - -int hpfs_read_ea(struct super_block *s, struct fnode *fnode, char *key, - char *buf, int size) -{ - unsigned pos; - int ano, len; - secno a; - char ex[4 + 255 + 1 + 8]; - struct extended_attribute *ea; - struct extended_attribute *ea_end = fnode_end_ea(fnode); - for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea)) - if (!strcmp(ea->name, key)) { - if (ea->indirect) - goto indirect; - if (ea_valuelen(ea) >= size) - return -EINVAL; - memcpy(buf, ea_data(ea), ea_valuelen(ea)); - buf[ea_valuelen(ea)] = 0; - return 0; - } - a = le32_to_cpu(fnode->ea_secno); - len = le32_to_cpu(fnode->ea_size_l); - ano = fnode->ea_anode; - pos = 0; - while (pos < len) { - ea = (struct extended_attribute *)ex; - if (pos + 4 > len) { - hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x", - ano ? "anode" : "sectors", a, len); - return -EIO; - } - if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return -EIO; - if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4)) - return -EIO; - if (!strcmp(ea->name, key)) { - if (ea->indirect) - goto indirect; - if (ea_valuelen(ea) >= size) - return -EINVAL; - if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea_valuelen(ea), buf)) - return -EIO; - buf[ea_valuelen(ea)] = 0; - return 0; - } - pos += ea->namelen + ea_valuelen(ea) + 5; - } - return -ENOENT; -indirect: - if (ea_len(ea) >= size) - return -EINVAL; - if (hpfs_ea_read(s, ea_sec(ea), ea->anode, 0, ea_len(ea), buf)) - return -EIO; - buf[ea_len(ea)] = 0; - return 0; -} - -/* Read an extended attribute named 'key' */ -char *hpfs_get_ea(struct super_block *s, struct fnode *fnode, char *key, int *size) -{ - char *ret; - unsigned pos; - int ano, len; - secno a; - struct extended_attribute *ea; - struct extended_attribute *ea_end = fnode_end_ea(fnode); - for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea)) - if (!strcmp(ea->name, key)) { - if (ea->indirect) - return get_indirect_ea(s, ea->anode, ea_sec(ea), *size = ea_len(ea)); - if (!(ret = kmalloc((*size = ea_valuelen(ea)) + 1, GFP_NOFS))) { - printk("HPFS: out of memory for EA\n"); - return NULL; - } - memcpy(ret, ea_data(ea), ea_valuelen(ea)); - ret[ea_valuelen(ea)] = 0; - return ret; - } - a = le32_to_cpu(fnode->ea_secno); - len = le32_to_cpu(fnode->ea_size_l); - ano = fnode->ea_anode; - pos = 0; - while (pos < len) { - char ex[4 + 255 + 1 + 8]; - ea = (struct extended_attribute *)ex; - if (pos + 4 > len) { - hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x", - ano ? "anode" : "sectors", a, len); - return NULL; - } - if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return NULL; - if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4)) - return NULL; - if (!strcmp(ea->name, key)) { - if (ea->indirect) - return get_indirect_ea(s, ea->anode, ea_sec(ea), *size = ea_len(ea)); - if (!(ret = kmalloc((*size = ea_valuelen(ea)) + 1, GFP_NOFS))) { - printk("HPFS: out of memory for EA\n"); - return NULL; - } - if (hpfs_ea_read(s, a, ano, pos + 4 + ea->namelen + 1, ea_valuelen(ea), ret)) { - kfree(ret); - return NULL; - } - ret[ea_valuelen(ea)] = 0; - return ret; - } - pos += ea->namelen + ea_valuelen(ea) + 5; - } - return NULL; -} - -/* - * Update or create extended attribute 'key' with value 'data'. Note that - * when this ea exists, it MUST have the same size as size of data. - * This driver can't change sizes of eas ('cause I just don't need it). - */ - -void hpfs_set_ea(struct inode *inode, struct fnode *fnode, const char *key, - const char *data, int size) -{ - fnode_secno fno = inode->i_ino; - struct super_block *s = inode->i_sb; - unsigned pos; - int ano, len; - secno a; - unsigned char h[4]; - struct extended_attribute *ea; - struct extended_attribute *ea_end = fnode_end_ea(fnode); - for (ea = fnode_ea(fnode); ea < ea_end; ea = next_ea(ea)) - if (!strcmp(ea->name, key)) { - if (ea->indirect) { - if (ea_len(ea) == size) - set_indirect_ea(s, ea->anode, ea_sec(ea), data, size); - } else if (ea_valuelen(ea) == size) { - memcpy(ea_data(ea), data, size); - } - return; - } - a = le32_to_cpu(fnode->ea_secno); - len = le32_to_cpu(fnode->ea_size_l); - ano = fnode->ea_anode; - pos = 0; - while (pos < len) { - char ex[4 + 255 + 1 + 8]; - ea = (struct extended_attribute *)ex; - if (pos + 4 > len) { - hpfs_error(s, "EAs don't end correctly, %s %08x, len %08x", - ano ? "anode" : "sectors", a, len); - return; - } - if (hpfs_ea_read(s, a, ano, pos, 4, ex)) return; - if (hpfs_ea_read(s, a, ano, pos + 4, ea->namelen + 1 + (ea->indirect ? 8 : 0), ex + 4)) - return; - if (!strcmp(ea->name, key)) { - if (ea->indirect) { - if (ea_len(ea) == size) - set_indirect_ea(s, ea->anode, ea_sec(ea), data, size); - } - else { - if (ea_valuelen(ea) == size) - hpfs_ea_write(s, a, ano, pos + 4 + ea->namelen + 1, size, data); - } - return; - } - pos += ea->namelen + ea_valuelen(ea) + 5; - } - if (!le16_to_cpu(fnode->ea_offs)) { - /*if (le16_to_cpu(fnode->ea_size_s)) { - hpfs_error(s, "fnode %08x: ea_size_s == %03x, ea_offs == 0", - inode->i_ino, le16_to_cpu(fnode->ea_size_s)); - return; - }*/ - fnode->ea_offs = cpu_to_le16(0xc4); - } - if (le16_to_cpu(fnode->ea_offs) < 0xc4 || le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) > 0x200) { - hpfs_error(s, "fnode %08lx: ea_offs == %03x, ea_size_s == %03x", - (unsigned long)inode->i_ino, - le32_to_cpu(fnode->ea_offs), le16_to_cpu(fnode->ea_size_s)); - return; - } - if ((le16_to_cpu(fnode->ea_size_s) || !le32_to_cpu(fnode->ea_size_l)) && - le16_to_cpu(fnode->ea_offs) + le16_to_cpu(fnode->acl_size_s) + le16_to_cpu(fnode->ea_size_s) + strlen(key) + size + 5 <= 0x200) { - ea = fnode_end_ea(fnode); - *(char *)ea = 0; - ea->namelen = strlen(key); - ea->valuelen_lo = size; - ea->valuelen_hi = size >> 8; - strcpy(ea->name, key); - memcpy(ea_data(ea), data, size); - fnode->ea_size_s = cpu_to_le16(le16_to_cpu(fnode->ea_size_s) + strlen(key) + size + 5); - goto ret; - } - /* Most the code here is 99.9993422% unused. I hope there are no bugs. - But what .. HPFS.IFS has also bugs in ea management. */ - if (le16_to_cpu(fnode->ea_size_s) && !le32_to_cpu(fnode->ea_size_l)) { - secno n; - struct buffer_head *bh; - char *data; - if (!(n = hpfs_alloc_sector(s, fno, 1, 0))) return; - if (!(data = hpfs_get_sector(s, n, &bh))) { - hpfs_free_sectors(s, n, 1); - return; - } - memcpy(data, fnode_ea(fnode), le16_to_cpu(fnode->ea_size_s)); - fnode->ea_size_l = cpu_to_le32(le16_to_cpu(fnode->ea_size_s)); - fnode->ea_size_s = cpu_to_le16(0); - fnode->ea_secno = cpu_to_le32(n); - fnode->ea_anode = cpu_to_le32(0); - mark_buffer_dirty(bh); - brelse(bh); - } - pos = le32_to_cpu(fnode->ea_size_l) + 5 + strlen(key) + size; - len = (le32_to_cpu(fnode->ea_size_l) + 511) >> 9; - if (pos >= 30000) goto bail; - while (((pos + 511) >> 9) > len) { - if (!len) { - secno q = hpfs_alloc_sector(s, fno, 1, 0); - if (!q) goto bail; - fnode->ea_secno = cpu_to_le32(q); - fnode->ea_anode = 0; - len++; - } else if (!fnode->ea_anode) { - if (hpfs_alloc_if_possible(s, le32_to_cpu(fnode->ea_secno) + len)) { - len++; - } else { - /* Aargh... don't know how to create ea anodes :-( */ - /*struct buffer_head *bh; - struct anode *anode; - anode_secno a_s; - if (!(anode = hpfs_alloc_anode(s, fno, &a_s, &bh))) - goto bail; - anode->up = cpu_to_le32(fno); - anode->btree.fnode_parent = 1; - anode->btree.n_free_nodes--; - anode->btree.n_used_nodes++; - anode->btree.first_free = cpu_to_le16(le16_to_cpu(anode->btree.first_free) + 12); - anode->u.external[0].disk_secno = cpu_to_le32(le32_to_cpu(fnode->ea_secno)); - anode->u.external[0].file_secno = cpu_to_le32(0); - anode->u.external[0].length = cpu_to_le32(len); - mark_buffer_dirty(bh); - brelse(bh); - fnode->ea_anode = 1; - fnode->ea_secno = cpu_to_le32(a_s);*/ - secno new_sec; - int i; - if (!(new_sec = hpfs_alloc_sector(s, fno, 1, 1 - ((pos + 511) >> 9)))) - goto bail; - for (i = 0; i < len; i++) { - struct buffer_head *bh1, *bh2; - void *b1, *b2; - if (!(b1 = hpfs_map_sector(s, le32_to_cpu(fnode->ea_secno) + i, &bh1, len - i - 1))) { - hpfs_free_sectors(s, new_sec, (pos + 511) >> 9); - goto bail; - } - if (!(b2 = hpfs_get_sector(s, new_sec + i, &bh2))) { - brelse(bh1); - hpfs_free_sectors(s, new_sec, (pos + 511) >> 9); - goto bail; - } - memcpy(b2, b1, 512); - brelse(bh1); - mark_buffer_dirty(bh2); - brelse(bh2); - } - hpfs_free_sectors(s, le32_to_cpu(fnode->ea_secno), len); - fnode->ea_secno = cpu_to_le32(new_sec); - len = (pos + 511) >> 9; - } - } - if (fnode->ea_anode) { - if (hpfs_add_sector_to_btree(s, le32_to_cpu(fnode->ea_secno), - 0, len) != -1) { - len++; - } else { - goto bail; - } - } - } - h[0] = 0; - h[1] = strlen(key); - h[2] = size & 0xff; - h[3] = size >> 8; - if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode->ea_anode, le32_to_cpu(fnode->ea_size_l), 4, h)) goto bail; - if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode->ea_anode, le32_to_cpu(fnode->ea_size_l) + 4, h[1] + 1, key)) goto bail; - if (hpfs_ea_write(s, le32_to_cpu(fnode->ea_secno), fnode->ea_anode, le32_to_cpu(fnode->ea_size_l) + 5 + h[1], size, data)) goto bail; - fnode->ea_size_l = cpu_to_le32(pos); - ret: - hpfs_i(inode)->i_ea_size += 5 + strlen(key) + size; - return; - bail: - if (le32_to_cpu(fnode->ea_secno)) - if (fnode->ea_anode) hpfs_truncate_btree(s, le32_to_cpu(fnode->ea_secno), 1, (le32_to_cpu(fnode->ea_size_l) + 511) >> 9); - else hpfs_free_sectors(s, le32_to_cpu(fnode->ea_secno) + ((le32_to_cpu(fnode->ea_size_l) + 511) >> 9), len - ((le32_to_cpu(fnode->ea_size_l) + 511) >> 9)); - else fnode->ea_secno = fnode->ea_size_l = cpu_to_le32(0); -} - |